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This appendix provides details on the cabling required to install the BPX switch.
Trunk cables connect the customer DSX-3 crossconnect point or T3-E3 Interface Module to the BPX switch at the LM-3T3 back card. Refer to Table B-1 for details.
| Cable Parameter | Description |
|---|---|
Type: | 75-ohm coax cable (RG-59 B/U for short runs, AT&T 734A for longer runs). Two per T3/E3 line (XMT and RCV). For European shipment of the BXM-E3 cards, in order to meet CE mark transient test requirement (IEC1000-4-4), RG-17G double shielded SMB cable must be used. |
Max. Length: | 450 feet max. between the BPX switch and the DSX-3/E3 point. |
Connector: | Terminated in male BNC; Rx is receive from trunk, Tx is transmit to trunk. |
Power connections are made to the AC Power Supply Shelf or the DC Power Entry Module at the rear of the BPX switch. Refer to Table B-2 and Table B-3. (next page) for acceptable cable and wire types.
AC power cables may be provided by the customer or ordered from Cisco. Several standard cables are available (see Table B-2). AC cables with other plugs or different lengths may be special ordered. For users who wish to construct their own power cable, the cable must mate with an IEC320 16/20A male receptacle on rear of the AC Power Supply Assembly.
| Cable Parameter | Description |
|---|---|
Cable: | Provided with 8 feet (2.3 m.) of 3-conductor wire with plug. |
Plug: customer end | 20 A NEMA L620, 3-prong plug (domestic) or |
DC wiring (Table B-3) is generally provided by the customer.
| Cable Parameter | Description |
|---|---|
Wiring: | Single conductor, 8 AWG recommended wire gauge, 75ºC insulation rating, copper conductors only. Provision is provided for attaching conduit. |
Connection: | 90º ring lug for #10 screw terminal block. |
This cabling connects data ports on the LM-BCC to StrataView Plus NMS computers, control terminals, and modems. It is also used for external clock inputs from a clock source. See Appendix C, BPX Switch Peripherals, for more details on peripherals that can be attached to these ports.
The auxiliary and control ports are used to connect one of the nodes in the network to a control terminal, StrataView NMS workstation, or modem connections for remote alarm reporting or system monitoring. Refer to Table B-4 and Table B-5 for details on this cable.
| Cable Parameter | Description |
|---|---|
Interface: | RS-232 DCE ports. |
Suggested Cable: | 24 AWG, 25-wire. A straight-through RS-232 cable is used for a terminal or printer connection. A null modem cable may be needed when interfacing with modems on either port. |
Cable Connector: | DB-25, subminiature, male. Table B-5 contains a list of the port pin assignments. |
Max. Cable Length: | 50 feet (15 m.) |
| Pin# | Name | Source | Description |
|---|---|---|---|
1 | FG | both | Frame Ground |
2 | TxD | DTE | Transmit Data |
3 | RxD | DCE | Receive Data |
4 | RTS | DTE | Request to Send |
5 | CTS | DCE | Clear to Send |
6 | DSR | DCE | Data Set Ready |
7 | SG | both | Signal Ground |
8 | CD | DCE | Carrier Detect |
20 | DTR | DTE | Data Term Ready |
The LAN connection is used to connect one of the nodes in the network to a StrataView Plus NMS workstation. See Table B-6 and Table B-7 for details.
| Cable Parameter | Description |
|---|---|
Interface: | Ethernet DCE port. |
Suggested Cable: | TBS |
Cable Connector: | DB-15, subminiature, male. Table B-7 contains a list of the port pin assignments. |
Max. Cable Length: | 50 feet (15 m.) max. to interface adapter. |
| Pin # | Name | Pin # | Name |
|---|---|---|---|
1 | Shield | --- | --- |
2 | Collision Presence + | 9 | Collision Presence - |
3 | XMT + | 10 | XMT - |
4 | Reserved | 11 | Reserved |
5 | RCV + | 12 | RCV - |
6 | Power return | 13 | Power (+12V) |
7 | Reserved | 14 | Reserved |
8 | Reserved | 15 | Reserved |
Refer to Appendix C, BPX Switch Peripherals, for modem cabling information.
This cabling is for making external clock connections for use by the BCC-32, BCC-3, and BCC-4 backcards. The BCC-32 uses the BCC-bc backcard, and the BCC-3 and BCC-4 both use the BCC-3-bc backcard.
Table B-8 through Table B-11 lists T1 clock cabling details.
| Cable Parameter | Description |
|---|---|
Cable Type: | 22 AWG, ABAM individually shielded twisted pair. Two pair per T1 line (1 transmit and 1 receive). |
Cable Connector: | Male DB-15 subminiature. See Table B-10 through Table B-11 for pinouts. |
Max. Cable Length: | 533 ft (162 m.) maximum between the BPX switch and the first repeater or CSU. Selection of cable length equalizers. |
| Pin # | Description |
|---|---|
1 | Transfer timing ring |
2 | Transfer timing tip |
3 & 4 | Transfer timing shield |
| Pin # | Description |
|---|---|
2 | Receive pair shield |
3 | Receive tip |
11 | Receive Ring |
| Pin # | Description | Function |
|---|---|---|
1 | Transmit tip | Transmit T1 timing signal synchronized to the node |
2 | Transmit pair shield |
|
3 | Receive tip | Receive clock for synchronized clock source for node |
4 | Receive pair shield |
|
7 | Transfer timing tip |
|
8 | Transfer timing shield |
|
9 | Transmit ring |
|
11 | Receive ring |
|
15 | Transfer timing ring |
|
Table B-12 through Table B-15 lists E1 clock cabling details.
| Connector | Description |
|---|---|
Cable Type: | 75-ohm coax cable for unbalanced connection or 100-120-ohm twisted pair for balanced connection. Two cables/pairs (1 transmit, 1 receive) per E1 line. |
Cable Connector: | Two female BNC for unbalanced connection; male DB15 for balanced connection. See Table B-13 and Table B-15 for pinouts. |
Max. Cable Length: | Approx. 100 meters maximum between the BPX switch and the first repeater or CSU. Equalizer for cable length. |
| Connector | Description |
|---|---|
BNC | Receive E1 from trunk |
| Pin # | Description |
|---|---|
2 | Receive pair shield |
3 | Receive tip |
11 | Receive Ring |
| Pin # | Description | Function |
|---|---|---|
1 | Transmit tip | Transmit T1 timing signal synchronized to the node |
2 | Transmit pair shield |
|
3 | Receive tip | Receive clock for synchronized clock source for node |
4 | Receive pair shield |
|
7 | Transfer timing tip |
|
8 | Transfer timing shield |
|
9 | Transmit ring |
|
11 | Receive ring |
|
15 | Transfer timing ring |
|
This cable (Table B-16) is for connecting network alarm outputs to the LM-ASM ALARM OUTPUT connector only. Table B-17 lists the pinouts for the network alarm outputs.
| Cable Parameter | Description |
|---|---|
Interface: | Dry-contact relay closure. |
Wire: | 24 AWG, shielded, 6-pair. |
Connector: | DB-15, Subminiature, male |
| Pin | Alarm | Description |
|---|---|---|
1 | Audible—Major | Normally open |
2 |
| Common |
9 |
| Normally closed |
4 | Visual—Major | Normally open |
5 |
| Common |
12 |
| Normally closed |
7 | unused | n.c. |
8 | unused | n.c. |
3 | Audible—Minor | Normally open |
11 |
| Common |
10 |
| Normally closed |
6 | Visual—Minor | Normally open |
14 |
| Common |
13 |
| Normally closed |
15 | unused | n.c. |
Table B-18 lists the various cables that may be ordered directly from Cisco. Cable lengths are specified as a suffix to the Cisco model number. For example 5610-50 indicates a 50 foot cable. Cables are generally available in standard lengths of 10 ft (3 m.), 25 ft (7.6 m.), 50 ft (15 m.), 75 ft (22.8 m.) and 100 ft (30 m.) Lengths of 101 ft. (30 m.) to 600 ft. (183 m.) are available on a special order.
When a cable is connectorized, the connector gender (male-female) will be indicated as well as the number of pins. For example RS-232/M25-M25 indicates a cable terminated with a male DB25 at both ends.
| Model# | Description | Usage |
|---|---|---|
T3-E3-10 | 75 | T3 or E3 trunk interface |
5620 | RS-232/M25-F25 | Control port to control terminal, StrataView, or ext. window device |
5621 | RS-232/M25-M25 special | Control or Aux. port to modem |
5623 | RS-232/M25-M25 | Aux. port to ext. window device |
5601 | Ground cable | DC |
5670 | Molex-pigtail | DC |
5671 | Spade lug-pigtail | DC |
The redundancy cables are a special "Y" cable available from Cisco. They are required for redundant trunk and data interfaces. Table B-19 lists the Y-cables used with various BPX switch back cards.
| Y - Cable | Used On | Cisco P/N |
|---|---|---|
T3 trunk | LM-3T3 | TBS |
E3 trunk | LM-3E3 | TBS |
Aux./Cont. ports | LM-BCC | TBS |
Ext. Clk. In | LM-BCC | TBS |
Ext. Clk. Out | LM-BCC | TBS |
Posted: Mon Jan 15 19:34:17 PST 2001
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