Example Transport Engineering Guide (TEG): DSX-1 Rear Cross Connect

Transcription

1 Example Transport Engineering Guide (TEG): DSX-1 Rear Cross Connect BOTC-TEG-2290 Section Table of Contents Page DS Data Sheet (weight, footprint, power, heat, timing, alarms/rm, DF blocks, CLEI) 2 1 Overview 3 2 Network Element IN/OUT connections 3 3 Equipment requirements 4 4 Relay rack and lineup layouts 5 5 Relay rack fuse panel input power feeder source and peak/list 2 amperage 6 6 DSX-1 panel label requirements 6 7 Cross Aisle Bridges Application guide for extended cross connect segments System connection details Issue Revisions Date 1 Original release of Bill Oakes Engineering Guideline for DSX-1. December 8, Revise into Word format. August 17, Change Data Sheet weight for Di-G2CU1 panel from 10 to 28 pounds due to error in ADC documentation. Overall rack weight changes from 320 to 608. October 2, 2007 Acronyms: American Wire Gauge (AWG), Battery Distribution Fuse Board (BDFB), Central Office (CO), Digital Cross connect System-electronic (DCS), Digital System Cross connect-manual (DSX), Distributing Frame (DF), Enclosed Network Extension-RT/CEV/Hut/Prem (ENE), IntraOffice Repeater (IOR), Network Element (NE), Receive (RX), Support Engineering Guide (SEG), Transmit (TX). Bill Oakes Telecom Consultants (BOTC) bill.oakes@att.net, Copyright All rights reserved. 1

2 Data Sheet: The preface section of all BOTC-TEGs is a data sheet that provides quick view information for weight, relay rack footprint, peak (LIST 2)/nominal (LIST 1) power amperage, heat dissipation wattage, timing, alarms/remote management, DF block and CLEI code requirements. The data shown is an ultimate condition (relay rack fully loaded with equipment as designed in associated BOTC-TEG). Even though many relay rack deployments are partially equipped, BOTC recommends basing initial space/engineering planning on ultimate data since existing rack layouts typically grow to conclusion without follow-up involvement by planning personnel. Category Weight Footprint Peak/LIST 2 amperage at 42.6V Nominal/LIST 1 amperage at 52V Heat dissipation Timing (BITS) Alarms Remote management DF blocks CLEI codes (see BOTC-SEG-0600 section 4) Data sheet for DSX-1 rear cross connect relay rack Requirement Remarks One relay rack: 120 pounds. One fuse panel: 10 pounds. Two troughs: pounds pounds. Worst case mix of equipment shelves/panels/units (16 Di-G2CU1 panels at 28 pounds each): 448 pounds. 33.5" wide x 15" 26" wide rack. 7.5" wide spacer between adjacent racks. 5" wide spacer at deep ultimate end of lineup. 2" deep front guard box. 8" deep rear guard box. See remarks N/A N/A N/A 1 discrete N/A See remarks PWFYAL2CAA T3MYAZ1CAA T3MYAWJCAA T1JYABHBAA None TECYAH7HAA Per section 3 and figure 4C, only middle Maintenance (M) rack of every 5 has single load BDFB feed. M rack LIST 2 is 20 amps per section 5. LIST 1 does not apply since power requirement is for occasional use of panel tracer lamps only. LIST 2 must account for maximum probable activation. Does not apply since heat is a function of LIST 1. See BOTC-SEG-0600 section 8. No timing requirement for DSX-1 racks. 1 status point required on CO alarm system for DSX-1 rack fuse panel alarm No Ethernet or RS232 TL1 remote management requirements for DSX-1 racks. Normally no DF connection for DSX-1 racks. Possible connection for optional Comm panel telephone lines per section 9E. Telect 0HPGMT07R fuse panel. ADC Di-G2CU1 DSX-1 cross connect panel. ADC DSX-CAP-BEST/100 DSX-1 cross aisle panel. ADC DSX-IB-23A DSX-1 interbay patch panel. ADC DSX-IB-23B DSX-1 interbay patch panel. ADC COMP-21 comm panel. 2 BOTC-TEG-2290

3 1. Overview: DSX-1 panels are used to terminate DS1 (1.544 Mb/s) signals that require a manual cross connect. Each panel has 84 fixed (not field removable) jack circuits. The circuits have front side IN, OUT, Monitor-OUT Bantam jacks for temporary In-Service/Out-of-Service patching routines and various testing functions. The panels have two sets of rear side wire wrap pinfields for NE cable and permanent cross connects. This type of DSX-1 panel design is called Rear Cross Connect (RX). DSX-1 circuits with terminated NE cable are referred to in this TEG as active jacks. Five wire (TX/RX pairs and one tracer lamp lead) jumpers are used to complete the permanent cross connect between DSX-1 panel circuits. These jumpers are supported by rear side vertical rings and horizontal troughs within a given DSX-1 lineup. When 7 DSX-1 lineups are contiguous, low cable racks (called Bridges in section 7) can be used to support the jumpers that run between lineups (continuous jumper from active jack in one lineup to active jack in other lineup). Non-contiguous DSX-3 lineups must use Cross Aisle panels (jumper from active jack in each lineup to Cross Aisle panel in same lineup with engineered cable between Cross Aisle panels). The total cross connect length (active jack to active jack including any cross aisle cable) has a footage limit that is related to NE cable length limits (see BOTC-SEG-0100 section 5 and 6). When the cross connect limit is exceeded, Intra-CO fiber spans or ADC DS1 IntraOffice Repeaters (IOR) may be required. Section 8 provides an Application Guide for DSX-1 cross connect segments. Double ended single (one coax and one tracer lamp lead) cords are used for temporary front side patching routines. If the routine is In Service, a portable Bridging Repeater (BR) unit is required (boosts active jack front side MON port from monitor level to full strength so patching can be done without disrupting NE service). Interbay Patch (also known as Beltline) panels are needed so local CO personnel can patch/restore these circuits without using excessively long cords (short cords run to the panel on either end with engineered cable between panels). Since the 1980s, DSX-1 cross connect and Interbay Patch panels have been deployed with small diameter Bantam front side patching jacks. Since many older embedded panels have large diameter 310 (also known as Longframe) patching jacks, some COs may require three types of various length patch cords (Bantam/Bantam, Bantam/310 and 310/310). 2. NE IN/OUT connections: To provide a uniform method of connecting different types of NEs, a basic set of guidelines was developed by the Bell System. Engineering/installation documents (BOTC-TEGs for example) must always agree with these guidelines so that transmission IN/OUT continuity is maintained between NE, DSX and DCS (Lucent DACS, Tellabs Titan) equipment. If you (NE or DCS) face a DSX, your TX goes to the DSX OUT jack and your RX comes from the DSX IN jack. If you (NE, DSX or DCS) face a DCS, your TX goes to the DCS IN port and your RX comes from the DCS OUT port. The roll of TX and RX between NEs is accomplished by IN to OUT/OUT to IN jumpers (if DSX-1) or internal electronic switching (if DCS). TX and RX cable between DSX-1 Cross Aisle panels must also roll since the cross connect jumper roll (NE DSX-1 circuit to Cross Aisle pins) at both ends will cancel each other out. DSX-1 Interbay Patch panel cabling has this same requirement (roll cable between panels since NE DSX-1 jack to Interbay Patch jack patch cord rolls at both ends will cancel each other out). 3

4 3. Equipment requirements: This section provides part number and usage details for equipment mounted in DSX-1 relay racks. Layouts for DSX-1 Maintenance (M) and Concentration (C) racks are shown in figure 4A and 4B. Per the figure 4C lineup layout, an M rack should be placed in the middle of each five rack group with two C racks on either side. A) Relay rack (M and C): One 7 Network rack with 2 x 23 drilling code and 5 rear welded guard box. One set of 2 front and 3 rear field mount guard box material must be ordered as a separate item so that the footprint depth is 15 (2 front, 5 rack, 8 rear). See BOTC-SEG B) Fuse panel (M and C racks): One Telect 0HPGMT07R high. See BOTC-SEG C) Comm panel (M racks only): Some Service Providers/Telcos use intra-co wireless communication systems (no Comm panel in M rack). If Comm panel is required, provide one ADC COMP high. Also provide one ADC COMP-HNR-P headset/handset holder and mount on left front rack upright next to Comm panel. D) Writing shelf (M racks only): One ADC RWS23-PUT high. E) Cross Aisle panels (M racks only): ADC DSX-CAP-BEST/ high. These panels are required when there are non-contiguous DSX-1 lineups in the CO and may also be needed for contiguous lineups if section 7 Bridges are not used. The number of Cross Aisle panels per M rack is dependent on variable conditions (number of other DSX- 1 lineups, expected quantity of permanent cross connects between lineups). Panel mounts on rear side rack uprights with front of panel (4 x 4 ring/trough side) facing the rear aisle. F) Interbay Patch panels (M racks only): One ADC DSX-IB-23A (25 circuit, 4 high) or DSX-IB-23B (28 circuit, 3.5 high). In COs with embedded 25 circuit Interbay Patch panels, continuation of the 25 circuit pattern is recommended. Introduction of 28 circuit panels (into existing 25 circuit mult) results in a circuit patch in with no patch out capability at any of the 25 circuit panel locations. These panels are required when there is more than one DSX-1 M rack in the CO. The panels mult between all M racks in the DSX-1 areas (including other floors). For example, from 1 st M rack to 2 nd to 3 rd, etc within each lineup and then between lineups. This allows CO personnel to patch-in at one M rack and then patch-out at any other M rack in the CO. G) Horizontal troughs (M and C racks): Two ADC DSX-CT-PB troughs (6 high, 8 deep). Upper trough in M rack is not required if Bridge (section 7) terminates in that rack (end of Bridge takes care of trough function). Initial installation of rack should provide the full complement of troughs (regardless of the number of DSX-1 panels added) so that all cross connect jumpers (rack to rack pass through or intra-rack) can be managed correctly. H) DSX-1 cross connect panels (M and C racks): ADC Di-G2CU1. 4 high. Quantity depends on job condition. Mount from plate 3 upward as shown in figure 4A and 4B. Each panel has 84 fixed (not field removable) light weight jack modules. Panels with removable jack modules (ADC D1M-1F0001 for example) are not recommended since the modules may become partially unseated when CO personnel remove front side patch cords. J) Vertical jumper rings (M and C racks): Rings are used for vertical management of rear side permanent cross connect jumpers. Di-G2CU1 (part H) panels are shipped with two 4 x 4 rings that must be mounted on the panel s left/right rear side by installation. When DSX-1 racks are only equipped with the first few panels (lower part of rack) there is usually no need for separate vertical rings (on the top portion of rack) since: 1. Jumpers run through a rack on horizontal troughs (vertical rings not used). 2. Jumpers associated with lower panels run through rings (provided with panels) to a lower trough in most cases. 3. Jumpers from the upper trough to lower panels can be run across the trough so they naturally fall into a vertical column down to the panel rings. In some cases, CO personnel may not realize that condition 3 jumpers should be run across the upper trough. This can create a slanted jumper column between two DSX-1 racks. To prevent these slanted columns from occurring, two (left/right) temporary ADC HDW ring assemblies should be provided when racks are only equipped with the first few panels. Mount on rear of rack uprights just below the upper trough. When the rack fills with panels, these temporary rings can be removed and reapplied on other new partially filled DSX-1 racks. 4

5 4. Relay rack and lineup layouts: BOTC-TEG-2290 GQ or 38 GQ or 38 Trough or Cross Aisle Bridge Trough or Cross Aisle Bridge GP or 37 GP or 37 connection (see section 7) connection (see section 7) GN or 36 GN or 36 GM or 35 Fuse panel GM or 35 Fuse panel GL or 34 GL or 34 GK or 33 GK or 33 GJ or 32 GJ or 32 GH or 31 GH or 31 GG or 30 GG or 30 Area for mounting Cross Aisle GF or 29 GF or 29 or DSX-1 panels GE or 28 GE or 28 GD or 27 GD or 27 GC or 26 GC or 26 GB or 25 GB or 25 GA or 24 GA or 24 EV or 23 EV or 23 Interbay Patch panel EU or 22 EU or 22 ET or 21 ET or 21 ES or 20 Comm panel (optional) ES or 20 ER or 19 Writing shelf ER or 19 EQ or 18 EQ or 18 EP or 17 EP or 17 EN or 16 EN or 16 EM or 15 EM or 15 EL or 14 EL or 14 EK or 13 EK or 13 EJ or 12 Area for mounting DSX-1 EJ or 12 EH or 11 panels EH or 11 EG or 10 (Writing shelf mounts at plate EG or 10 EF or 9 21 if Comm panel is not used) EF or 9 EE or 8 EE or 8 ED or 7 ED or 7 EC or 6 EC or 6 EB or 5 EB or 5 EA or 4 EA or 4 FA or 3 FA or 3 FB or 2 FB or 2 FC or 1 Trough FC or 1 Trough FD or 0 FD or 0 2 x 23 2 x 23 FIGURE 4A DSX-1 Maintenace rack Area for mounting DSX-1 panels FIGURE 4B DSX-1 Concentration rack See section 3 See section 3 8" rear guard boxes (5" welded plus 3" field mount) " C 7.5" C 7.5" M 7.5" C 7.5" C 7.5" 7.5" 7.5" M 2" front field mount guard boxes FIGURE 4C Lineup footprint for DSX-1 racks. The 1st DSX-1 rack in every group of 5 should be an M rack. To provide a path for cross connect jumpers, subsequent M rack jobs (rack 08 in this example) should add empty racks (06, 07) with upper/lower troughs between the M rack and existing C rack (05) in the lineup. 5

6 5. Relay rack fuse panel input power feeder source and peak/list 2 amperage: DSX-1 racks have a fuse panel that requires an input power feeder. To prevent low amperage DSX-1 rack equipment (usually tracer lamps only) from consuming valuable BDFB output assignments, DSX-1 Concentration (C) rack fuse panel inputs should be fused from their associated DSX-1 Maintenance (M) rack. As shown in figure 4C, each M rack serves up to four C racks (two on either side). Size power inputs for new M racks to serve all projected equipment in a five rack configuration (M rack, four C racks). Feed fuse panel inputs for new C racks from their M rack fuse panel outputs using 12 AWG wire (see BOTC-SEG-0700 section 9). Size M rack fuse panel output fuses at least 125 percent of the C rack ultimate LIST 2 amperage requirement. Some embedded M rack fuse panels may not have enough output positions to feed panel equipment in their own rack and adjacent C rack fuse panel inputs. In this case, C rack fuse panel inputs must be run directly to a BDFB. Tracer Lamps (TL) on DSX-1 panels have a peak/list 2 drain of.01 amps (.84 amps for 84 circuit panel if all TLs are activated). Since it s very unlikely that all TLs for all panels in a DSX-1 rack will be activated at the same time, using a true LIST 2 total drain value would falsely load BDFBs. BOTC recommends a design of 4 amps LIST 2 for DSX-1 C racks and M racks. This sums up to a 20 amp LIST 2 for the M rack BDFB power feeder (since M rack serves itself and four C racks). 6. DSX-1 panel label requirements: DSX-1 panels require two sets of labels (one for NE cable assignments and one for cross connect assignments made by CO personnel). Di-G2CU1 panels (see section 3H) include three label sets. Installers should mount one set of labels (.25 high strips) below the front side LEDs and use them for NE cable assignments. The second label set should be mounted on left and right front side flip/back panels (three per side) so they can be optionally used by CO personnel for cross connect assignments. Mount the third label (1.25 high, 20.5 wide) on the panel s rear side jumper trough so it provides an alternate choice (if preferred by CO personnel) for cross connect designations. 7. Cross Aisle Bridges: A) Overview: As shown in section 1, Cross Aisle Bridges can be used to support cross connect jumpers that run between 7 DSX-1 contiguous lineups. Non-contiguous lineups must use Cross Aisle panels per section 3E. In addition to a long list of smaller parts, Bridge assemblies consist of a swivel center section, two ramps and two horizontal troughs. The troughs are designed to mount in the standard upper trough position in DSX-1 racks (see figure 4A and 4B). When doing a Bridge retrofit in existing DSX-1 areas, engineering vendors should consult with Service Provider/Telco personnel if the upper trough position is lower than normal (may be too low for CO personnel to pass underneath installed Bridge). B) Bridge part numbers: See ADC drawing for assembly details. AUX-0X0421 (horizontal trough ends are 5 high and 5 deep). AUX-0X0422 (horizontal trough ends are 5 high and 8 deep). AUX-0X0425 (horizontal trough ends are 8 high and 5 deep). AUX-0X0420 (horizontal trough ends are 8 high and 8 deep). C) Aisle width and rack offset measurements: The aisle width capability of Bridges is defined as ramp mounting ear flange on one end to ramp mounting ear flange on the other end (not including the depth of troughs provided for each end). In other words, the rack upright to rack upright measurement must be reduced by the Bridge s (not the existing) trough depth on both ends. If the two connecting racks are directly aligned with each other (no offset), the aisle width can be a minimum of 36 to a maximum of 49. For example, if the rack upright to rack upright measurement was 65, AUX-0X0420 could be used (assuming no offset) since each Bridge trough is 8 deep (65 minus 16 for the two troughs is 49 ). If the two connecting racks are offset from each other, the 49 no offset maximum is reduced by a.65 to 1 ratio. For each 1 of offset, the maximum aisle width is reduced by.65 on a linear scale. The maximum offset is 20. At full offset (20 ) the aisle width maximum is 36 (20 times.65 is 13 and 49 minus 13 is 36 ). At 50 percent allowable offset (10 ), the maximum aisle width is Keep in mind that the Bridge trough depth at both ends must be added to aisle width calculations when measurements are taken 6

7 between rack uprights. All of the above assumes that both ends of a Bridge mount on the Cross Connect (CC) side of DSX-1 racks. When a Bridge mounts on the Non-Cross Connect (NCC) side of a DSX-1 rack, the Bridge ramp mounting ear flange is attached directly to the rack upright (using extender brackets provided with Bridge). The Bridge s trough is then used on the CC side. This means that rack upright to rack upright measurement is not reduced by the Bridge s trough depth on NCC side ends. For example, any of the Bridges in part B could be used if both ends were NCC, there was no offset and rack upright to rack upright measurement was no more than 49. Due to variables in their swivel/slide sections, some of the Bridges in part B may require an adjustment to work at certain points along the 49 (zero offset) to 36 (20 offset) range. In these cases, separately provided stand-offs (see BOTC-SEG-0600 section 11 manufacturers) can be placed between the ramp mounting ear flange and horizontal trough connection. D) Back panels: Regular DSX-1 horizontal troughs have a back panel that is fixed (cannot be removed). Bridge troughs have a removable back panel. If the Bridge mounts to a DSX-1 rack and there is no Bridge on the rack s opposite side (for jumpers from lineup 1 passing through lineup 2 and going on to lineup 3), the back panel should be mounted in the trough. If there is another Bridge on the rack s opposite side, the back panel should not be mounted (so that jumpers can go on to the next lineup). E) Blank panels: As mentioned in part C, Bridges can mount on the NCC side of a DSX-1 rack. In this case, the Bridge trough (back panel removed) is then used on the CC side. If there is not a Bridge on the CC side that goes on to another lineup, a Blank finishing panel is required on the trough s front side. The following ADC Blank panels should be used for this condition (see ADC drawing for details). AUX-0X0083 (for 5 high trough per part B). AUX-0X0085 (for 8 high trough per part B). F) Trough extensions: Cross connect jumpers within a lineup are supported by horizontal troughs and vertical rings. When jumpers span the gap between upper troughs in adjacent DSX-1 racks, a trough extension is required to prevent sagging of the jumper bundle. The extension also helps jumpers make the vertical to horizontal transition. Since Bridge troughs do not come with left/right extensions, one of the following ADC Trough Extensions should be provided for each Bridge trough (match the Extension height/depth dimensions to the trough s). See ADC drawing for additional details. Each part number provides one set of left/right Extensions. The space dimension is minimum space required between DSX-1 racks. AUX-0X5037 (5 high, 5 deep, 7.5 or 5 space). AUX-0X5038 (5 high, 8 deep, 7.5 or 5 space). AUX-0X5041 (8 high, 5 deep, 7.5 or 5 space). AUX-0X5042 (8 high, 8 deep, 7.5 or 5 space). G) Deployment frequency: The potential number and routing of cross connects between DSX-1 lineups is difficult to forecast. With this in mind, Bridge deployment frequency becomes a unique issue for each group of lineups. Engineering vendors should consult with Service Provider/Telco personnel on this question prior to Bridge placement in new or retrofitted areas. Some of the items to be considered: Each Bridge can accommodate about 5000 five wire jumper circuits. Not placing enough Bridges can result in abnormally long cross connect lengths (may drive the need for IORs). 84 jack panel lineups have a higher potential for cross connects than embedded 56 jack panel lineups. BOTC recommends an initial consideration of one Bridge for each group of five DSX-1 racks (middle rack of five to minimize cross connect lengths). 7

8 8. Application guide for extended cross connect segments: See BOTC-SEG-0100 section 5 for an overview of DS1 attenuation. This section 8 is a detailed continuation of section 5E. DSX-1 cross connects are defined as extended when their conductor attenuation (sum of cross connect jumpers and any cable between Cross Aisle panels) exceeds 1dB. As their network evolved into many COs with multiple DSX-1 lineups, many Service Providers/Telcos developed planning guidelines to minimize the impact (direct cabling of NEs to DACS/Titan DCS, strategic placement of DSX-1 lineups, lineup lengths, etc). In spite of these planning efforts, some COs now have multiple DSX-1 lineups with extended cross connects. The most cost effective method of dealing with this issue is to first evaluate a per CO, customized reduction in NE to DSX-1 cable footage limits before considering these more expensive solutions: A) Add intra-co fiber spans for all extended cross connect circuits. Estimated cost is about $165 per circuit based on the use of Fujitsu FW4100ES. B) Add ADC DS1 IOR equipment for all extended cross connect circuits. Estimated cost (CO floor space, rack, fuse panel, BDFB power, IOR equipment, cabling, vendor labor) is about $260 per circuit. C) Recable all NE to DSX-1 circuits that originally used 1249C 26 AWG cable, and have an extended cross connect, with 600C 22 AWG cable. This would also include changing that CO from 1249C as a first choice to 600C as a first choice on all going forward NE jobs. Estimated cost is very hard to define since it involves not only recabling/new cabling efforts but also congestion problems in CO overhead and DSX-1 areas. See BOTC-SEG section 6B for exponential relationship of cable diameter and build-up impact. D) Add or grow DCS equipment. Recable all NE to DSX-1 circuits, that have an extended cross connect, to DCS. Estimated cost for this choice is also hard to define since it involves so many DCS variables. When CO DSX-1 cross connects are extended, BOTC recommends a first step review prior to the more expensive solutions shown above. This basically involves taking some of the DSX-1 to final NE RX section db allowance (in both directions so that LBO routines are not changed for field personnel per BOTC-SEG-0100 section 5) and moving it into the middle cross connect section. These type of cross connects should be considered within the BOTC-SEG-0100 section 5E general network condition (they are not extended): Within a given DSX-1 lineup. Between several DSX-1 lineups that are Bridged together (per section 7) with no more than 120 feet of cross connect jumpers from one DSX-1 panel to another. Between DSX-1 lineups that are connected with up to 100 feet of 22 AWG cross aisle cable (see section 9C). This keeps the conductors (jumpers and any engineered cross aisle cable) within the 1dB cross connect attenuation limit. If DSX-1 lineup separation is beyond the these conditions, cross connects between them are extended. This requires taking some of the DSX-1 to final NE RX 2.5dB allowance and moving into the Cross Aisle cable segment. To calculate this ratio, multiply the end to end cable footage between Cross Aisle panels by.0042 (per foot db for 600C that is always required between these panels to reduce signal loss). Subtract the result from 2.92dB (total general network condition allowance for cross aisle cable and DSX-1 to NE RX). This provides a new DSX-1 to NE RX db limit for the CO. To find the new NE to DSX-1 footage limits, divide the new DSX-1 to NE RX db by.0065 for 1249C or by.0042 for 600C. See figure 8 for examples of DSX-1 general network condition and extended cross connects. If the new NE to DSX-1 600C footage limit does not cover all portions of the ultimate NE growth area, future NE placement in those areas must use one of the more expensive solutions shown above or be restricted to the new 600C footage limit. Without this, future NE to DSX-1 to NE circuits may exceed the end to end db allowance. Once a CO has established extended DSX-1 cross connects, Service Provider/Telco personnel and engineering vendors must manage the condition over time since it reduces the general network condition NE to DSX-1 footage limits shown in BOTC-SEG-0100 section 6A. 8

9 Beyond 595': All NE in this area must use one of the more expensive solutions. Beyond 495': All NE in this area must use one of the more expensive solutions. Beyond 395': All NE in this area must use one of the more expensive solutions. Up to 595': All 600C cable NE in this area OK. All 1249C cable NE in this area must use one of the more expensive solutions. Up to 495': All 600C cable NE in this area OK. All 1249C cable NE in this area must use one of the more expensive solutions. Up to 395': All 600C cable NE in this area OK. All 1249C cable NE in this area must use one of the more expensive solutions. Up to 380': All NE in this area are OK regardless of the cable type (1249C or 600C). Up to 320': All NE in this area are OK regardless of the cable type (1249C or 600C). Up to 255': All NE in this area are OK regardless of the cable type (1249C or 600C). DSX-1 lineup DSX-1 lineup DSX-1 lineup Bridged lineups with no more than 120' of cross connect jumpers or up to 100 feet of cross aisle cable. 200' cable between cross aisle panels. 300' cable between cross aisle panels DSX-1 lineup DSX-1 lineup DSX-1 lineup Up to 380': All NE in this area are OK regardless of the cable type (1249C or 600C). Up to 320': All NE in this area are OK regardless of the cable type (1249C or 600C). Up to 255': All NE in this area are OK regardless of the cable type (1249C or 600C). Up to 595': All 600C cable NE in this area OK. All 1249C cable NE in this area must use one of the more expensive solutions. Up to 495': All 600C cable NE in this area OK. All 1249C cable NE in this area must use one of the more expensive solutions. Up to 395': All 600C cable NE in this area OK. All 1249C cable NE in this area must use one of the more expensive solutions. Beyond 595': All NE in this area must use one of the more expensive solutions. Beyond 495': All NE in this area must use one of the more expensive solutions. Beyond 395': All NE in this area must use one of the more expensive solutions. EXAMPLE 1: DSX-1 "general network condition" cross connect as described in section 8 and BOTC-SEG-0100 section 5. EXAMPLE 2: Moderate size CO. Cross aisle loss is.84db. NE 1249C limit is 320' (2.92dB -.84dB = 2.08dB /.0065 = 320). NE 600C limit is 495' (2.92dB -.84dB = 2.08dB /.0042 = 495). EXAMPLE 3: Large size CO. Cross aisle loss is 1.26dB. NE 1249C limit is 255' (2.92dB dB = 1.66dB /.0065 = 255). NE 600C limit is 395' (2.92dB dB = 1.66dB /.0042 = 395). FIGURE 8 Examples of multiple DSX-1 lineup cross connect conditions. All footages shown are end to end cable (including drops to equipment) and can be same floor or between floors. 9

10 9. System connection details: A) Fuse panel: Step 1 (Single load input feeder from BDFB or M rack): See BOTC-SEG-0500 section 11 for BDFB fuse/feeder sizing responsibility and BOTC-SEG-0700 section 9 for wire material. Provide 2 two hole lugs (.25 studs on.625 centers) for input feeder connections (M rack wire size determined by vendor based on job conditions, 12 AWG wire for C racks). 20 amp recommended LIST 2 for M rack per section 5. Step 2 (Chassis ground): Provide 1 two hole lug (No.10 studs on.625 centers) for 6 AWG wire. Lug must have 45 degree tongue due to adjacent GMT output terminal block (cannot use flat lug) and panel rear cover (cannot use 90 degree lug). Connect lug to relay rack ground using 6 AWG wire (see BOTC-SEG-0700 section 7 and 9). Step 2 (Alarms): Run 24 AWG Black and Red-Black wire pair (see BOTC-SEG-0700 section 8) from fuse panel R set NO/C wire wrap pins to CO alarm system (Dantel) status point. No connection required for V and A set pins. B) Di-G2CU1 DSX-1 cross connect panel: Step 1 (Power): Connect -48V and GRD lugs to rack fuse panel output position using 22 AWG Black/Red-Black wire pair (see BOTC-SEG-0700 section 8). Use Red-Black lead for -48V and Black lead for RTN. Provide Thomas & Betts (or generic equivalent) RA18-6 ring terminals for Di-G2CU1 end and RA484 ring terminals for fuse panel end. Maximum drain is.84 amp. Fuse at 1.33 amp (see BOTC-SEG-0500 section 14). Step 2 (Chassis ground): Connect CHASSIS GRD lug to relay rack ground using spare 22 AWG Black wire from step 1. Provide Thomas & Betts (or generic equivalent) RA18-6 ring terminal for Di-G2CU1 end. Ensure that the factory provided jumper between CHASSIS GRD and SHIELD GRD lugs remains in place since this provides a ground for the front side jack sleeve connection (mates with patch cord sleeve lead). Step 3 (Cables from NEs): Cables normally run on NE job (determines 1249C versus 600C cable). Ground cables at NE end (do not ground at DSX-1 panel end). NE TX pair connects to Di-G2CU1 OUT T/R wire wrap pins, NE RX connects to Di-G2CU1 IN T/R wire wrap pins. C) DSX-CAP-BEST/100 cross aisle panel: Step 1 (Chassis ground): Panel has two CHASSIS GND lugs but no connection required since panel is not fused and GND lugs are not needed for cable drain wire path to ground. Step 2 (TX/RX cables to far end cross aisle panel): Run four (two TX, two RX) 50 pair 600C cables to far end cross aisle panel (see BOTC-SEG-0100 section 14). Connect cable drain wires to rack ground at one end only (do not ground both ends). 1249C not used since it increases cross connect signal loss. Roll TX and RX cables between panels (OUT on one panel goes to IN on other). Panel connections are wire wrap. Circuits between panels connect sequentially (1 to 1, 2 to 2, etc). Panel mounts on rear side rack uprights with front of panel (4 x 4 ring/trough side) facing the rear aisle. 600C cables connect to panel s rear side (facing front aisle). Step 3 (Tracer lamp cable to far end cross aisle panel): Panel has 100 wire wrap TL pins for tracer lamp leads. Run one 50 pair 24 AWG 200A type cable to far end cross aisle panel (see BOTC-SEG-0100 section 14). Circuits between panels connect sequentially (1 to 1, 2 to 2, etc). D) DSX-IB-23A and -23B interbay patch panels: Step 1 (Power): Connect -48V and GND lugs to rack fuse panel output position using 22 AWG Black/Red-Black wire pair (see BOTC-SEG-0700 section 8). Use Red-Black lead for -48V and Black lead for RTN. Provide Thomas & Betts (or generic equivalent) RA18-6 ring terminals for panel end and RA484 ring terminals for fuse panel end. Maximum drain is.28 amp. Fuse at.5 amp (see BOTC-SEG-0500 section 14). Step 2 (Chassis ground): Connect CHASSIS GRD lug to relay rack ground using spare 22 AWG Black wire from step 1. Provide Thomas & Betts (or generic equivalent) RA18-6 ring terminal for panel end. Ensure that the factory provided jumper between CHASSIS GRD and SHIELD GRD lugs remains in place since this provides a ground for the front side jack sleeve connection (mates with patch cord sleeve lead). 10

11 Step 3 (IN/OUT cables to far end interbay patch panel): Run two 25 pair (if -23A panel) or 28 pair (if -23B panel) 600C cables from LEFT side of this panel to RIGHT side of far end interbay patch panel (see BOTC-SEG-0100 section 14). 1249C not used since it increases In-Service patching signal loss. Roll IN and OUT cables between panels (OUT A/B pins on one panel go to IN C/D pins on other). Connect cable drain wires to rack ground at one end only (do not ground both ends). Circuits between panels connect sequentially (1 left to 1 right, etc). Step 4 (Busy lamp cable to far end interbay patch panel): Run 25 pair (if 23A panel) or 28 pair (if 23B panel) 24 AWG 200A type cable from LEFT side E/F pins on this panel to RIGHT side E/F pins on far end cross aisle panel (see BOTC-SEG-0100 section 14). Do not roll leads (E pin BY, F pin G) within pair. Circuits between panels connect sequentially (1 left to 1 right, etc). Step 5 (False load resistors): To ensure compatibility for all new or embedded NE to NE patching combinations, a 100 Ohm false load is required across left and right side IN pins (C, D) that are unterminated (no cable connection). Provide and mount one ADC HDW resistor for each set of unterminated IN pins. E) COMP-21 panel (optional per section 3C): Step 1 (Power): Connect screw terminals 11 (-48V) and 10 (RTN) to rack fuse panel output position using 22 AWG Black/Red-Black wire pair (see BOTC-SEG-0700 section 8). Use Red-Black lead for -48V and Black lead for RTN. Provide Thomas & Betts (or generic equivalent) RA484 ring terminals for fuse panel end. Maximum drain is.13 amp. Fuse at.5 amp (see BOTC-SEG-0500 section 14). Step 2 (Chassis ground): Connect screw terminal 12 to relay rack ground using spare 22 AWG Black wire from step 1. Step 3 (Fusing for front side maintenance jack): Consult with Service Provider/Telco personnel about the need for this circuit (surveys show many CO personnel do not use it). If required, connect screw terminals 9 (-48V) and 8 (RTN) to rack fuse panel output position using 22 AWG Black/Red-Black wire pair (see BOTC-SEG-0700 section 8). Use Red-Black lead for -48V and Black lead for RTN. Provide Thomas & Betts (or generic equivalent) RA484 ring terminals for fuse panel end. Maximum drain is negligible. Fuse at 1.33 amp (see BOTC-SEG-0500 section 14). Step 4 (Telephone lines): Comm panel has 50 pin male connector on rear side (see BOTC-SEG-0100 section 7). Consult with Service Provider/Telco personnel on cabling method. Initial Comm panel in lineup normally runs directly to DF block or to CO backboard. Subsequent Comm panels in lineup mult to preceding Comm panel (mult limit is 3 panels). Provide the following for each Comm panel: One CSI CA T001 Bridge cable (connectorized 25 pair 24 AWG 200A type, 4 feet long). Female connector on one end plugs into male on Comm panel. Other end has two male connectors (one for cable from succeeding panel in mult and the other for cable to preceding panel in mult or direct run to DF/Backboard. One 25 pair 24 AWG 200A type cable (per BOTC-SEG-0100 section 14) as follows: If initial Comm panel in lineup (direct run), cable must be female connectorized on one end (to mate with CA T001 male). Other end is bulk (see figure 9E for telephone line circuits, lead designations, color code and DF block layout). BOTC recommends Cablcon T XXX or Great Lakes XXX factory formed cables (see BOTC-SEG-0100 section 7 for manufacturer contacts). XXX indicates footage. If subsequent Comm panel in lineup (mult condition), cable must be female connectorized on both ends (to mate with CA T001 male at this panel and preceding panel in mult). BOTC recommends Cablcon T XXX or Great Lakes XXX factory formed cables. XXX indicates footage. 11

12 Comm panel connector telephone line circuits, lead designations and color code Pin Line Lead Color Pin Line Lead Color 1 R BL-W 14 6 A BR-BK A1 26 T W-BL 39 A BK-BR SG 2 A1 O-W 15 5 L S-BK LG 1 27 A W-O 40 LG BK-S L 3 L G-W 16 R BL-Y A 6 28 LG W-G 41 T Y-BL R 4 R BR-W 17 1 SG O-Y T 2 29 T W-BR 42 Spare Y-O 5 9 A S-W 18 L G-Y 6 30 A W-S 43 LG Y-G 6 2 L BL-R 19 R BR-Y 7 31 LG R-BL 44 T Y-BR 7 3 R O-R 20 Spare S-Y 32 3 T R-O 45 Spare Y-S 8 8 A G-R 21 L BL-V 7 33 A R-G 46 LG V-BL 9 3 L BR-R 22 R O-V 8 34 LG R-BR 47 T V-O 10 R S-R 23 L G-V T R-S 48 LG V-G 11 7 A BL-BK 24 L BR-V 8 36 A BK-BL 49 LG V-BR 12 4 L O-BK 25 R S-V 9 37 LG BK-O 50 T V-S 13 R G-BK 5 38 T BK-G Comm panel telephone line circuit layout on portion of Conventional DF block. View is from block's front (jumper) side FIGURE 9E Comm panel connector wiring and DF block layout. 12