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Table Of Contents
Auxiliary and Control Port Cabling
BPX Switch Cabling Summary
This chapter specifies the cabling required to install the BPX switch.
Contents of this chapter include:
Note
In all cable references:
The Transmit direction is from the BPX switch.
The Receive direction is to the BPX switch.
Trunk Cabling
Trunk cables connect the customer DSX-3 crossconnect point or T3-E3 Interface Module to the BPX switch at the LM-3T3 back card (see Table 31-1).
Power Cabling
Power connections are made to the AC Power Supply Shelf or the DC Power Entry Module at the rear of the BPX switch. For acceptable cable and wire types, see Table 31-2 and Table 31-3.
AC Powered Nodes
AC power cables may be provided by you or ordered from Cisco. Several standard cables are available (see Table 31-2). AC cables with other plugs or different lengths may be special ordered.
For those who wish to construct their own power cable, the cable must mate with an IEC320 16/20A male receptacle on the rear of the AC Power Supply Assembly.
DC Powered Nodes
DC wiring is generally provided by the customer. Table 31-3 lists the cable parameters.
LM-BCC Cabling
LM-BCC cabling connects data ports on the LM-BCC to control terminals and modems. It is also used for external clock inputs from a clock source.
See for more details on peripherals that can be attached to these ports.
Auxiliary and Control Port Cabling
The auxiliary and control ports are used to connect one of the nodes in the network to a control terminal or modem connections for remote alarm reporting or system monitoring. For details on this cable, see Table 31-4 and Table 31-5.
Table 31-4 Auxiliary and Control Port Cabling
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 31-5 contains a list of the port pin assignments.
Max. Cable Length:
50 feet (15 m)
The auxiliary and control port pin assignments are listed in Table 31-5.
LAN Port Cabling
The LAN connection is used to connect one of the nodes in the network to a Cisco WAN Manager NMS workstation (see Table 31-6 and Table 31-7).
Table 31-6 LAN Port Cabling
Interface:
Ethernet DCE port.
Suggested Cable:
TBS
Cable Connector:
DB-15, subminiature, male.
Table 31-7 contains a list of the port pin assignments.Max. Cable Length:
50 feet (15 m.) max. to interface adapter.
The LAN port pin assignments are listed in Table 31-7.
Modem Cabling
For modem cabling information, see "Connecting Temporary Terminal and Attaching Peripherals."
External Clock Input Cabling
This cabling is for making external clock connections for use by the BCC-32 and BCC-4 back cards.
The BCC-32 uses the BCC-bc back card.
The discontinued BCC-3 and BCC-4 both use the BCC-3-bc back card.
Note
T1 Clock Cabling
Table 31-8 through Table 31-11 lists T1 clock cabling details.
Table 31-8 External Clock Cabling
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 31-10 through Table 31-11 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.
Table 31-9 T1 Connection to XFER TMG on BCC-bc
1
Transfer timing ring
2
Transfer timing tip
3 & 4
Transfer timing shield
Table 31-10 T1 Connection to EXT TMG on BCC-bc
2
Receive pair shield
3
Receive tip
11
Receive ring
E1 Clock Cabling
Table 31-12 through Table 31-15 lists E1 clock cabling details.
Table 31-12 E1 Connector Pin Assignments for External Clock
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 31-13 and Table 31-15 for pinouts.
Max. Cable Length:
Approximately 100 meters maximum between the BPX switch and the first repeater or CSU. Equalizer for cable length.
Table 31-13 E1 Connection 75 Ohm to EXT TMG on BCC-bc or BCC-3-bc
BNC
Receive E1 from trunk
Table 31-14 E1 Connection 100/120 Ohm to EXT TMG on BCC-bc
2
Receive pair shield
3
Receive tip
11
Receive ring
External Alarm Cabling
This cable (see Table 31-16) is for connecting network alarm outputs to the LM-ASM ALARM OUTPUT connector only. Table 31-17 lists the pinouts for the network alarm outputs.
Table 31-16 External Alarm Cabling
Interface:
Dry-contact relay closure
Wire:
24 AWG, shielded, 6-pair
Connector:
DB-15, Subminiature, male
Standard BPX Switch Cables
Table 31-18 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 the following standard lengths:
•
•
•
•
•
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) is 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.
Redundancy "Y" Cable
The redundancy cables are a special "Y" cable available from Cisco. They are required for redundant trunk and data interfaces.
Table 31-19 lists the Y-cables used with various BPX switch back cards.
Table 31-19 Redundancy Y-Cables
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: Tue May 10 21:23:10 PDT 2005
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