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BPX Switch Cabling Summary

BPX Switch Cabling Summary

This appendix provides details on the cabling required to install the BPX switch.


Note In all cable references, the transmit direction is from the BPX switch, receive 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. Refer to Table B-1 for details.


Table B-1: Trunk Cables
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 Cabling

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 Powered Nodes

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.


Table B-2: AC Power Cables
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
13 A 250 Vac BS1363, 3-prong fused plug (UK, Ireland)
CEE 7/7 (Continental Europe)
AS3112 (Australia/New Zealand)
CEI23-16/VII (Italy)

DC Powered Nodes

DC wiring (Table B-3) is generally provided by the customer.


Table B-3: DC Power Wiring
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.

LM-BCC Cabling

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.

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, 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.


Table B-4: Auxiliary and Control Port Cabling
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.)


Table B-5:
Auxiliary and Control Port Pin Assignments
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

LAN Port Cabling

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.


Table B-6: LAN Port Cabling
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.


Table B-7:
LAN Port Pin Assignments
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

Modem Cabling

Refer to Appendix C, BPX Switch Peripherals, for modem cabling information.

External Clock Input Cabling

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.

T1 Clock Cabling

Table B-8 through Table B-11 lists T1 clock cabling details.


Table B-8: External Clock Cabling
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.


Table B-9: T1 Connection to XFER TMG on BCC-bc
Pin # Description

1

Transfer timing ring

2

Transfer timing tip

3 & 4

Transfer timing shield


Table B-10:
T1 Connection to EXT TMG on BCC-bc
Pin # Description

2

Receive pair shield

3

Receive tip

11

Receive Ring


Table B-11:
T1 Connection to EXT 1 or EXT 2 on BCC-3-bc
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

E1 Clock Cabling

Table B-12 through Table B-15 lists E1 clock cabling details.


Table B-12: E1 Connector Pin Assignments for External Clock
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.


Table B-13:
E1 Connection 75 Ohm to EXT TMG on BCC-bc or BCC-3-bc
Connector Description

BNC

Receive E1 from trunk


Table B-14: E1 Connection 100/120 Ohm to EXT TMG on BCC-bc
Pin # Description

2

Receive pair shield

3

Receive tip

11

Receive Ring


Table B-15:
E1 Connection 100/120 Ohm to EXT 1 or EXT 2 on BCC-3-bc
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

External Alarm Cabling

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.


Table B-16: External Alarm Cabling
Cable Parameter Description

Interface:

Dry-contact relay closure.

Wire:

24 AWG, shielded, 6-pair.

Connector:

DB-15, Subminiature, male


Table B-17:
Network Alarm Pin Assignments
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.

Standard BPX Switch Cables

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.


Table B-18: Standard Cables Available from Cisco
Model# Description Usage

T3-E3-10
T3-E3-25
T3-E3-50
T3-E3-75
T3-E3-xx

75

coax/BNC-BNC, 10'
75

coax/BNC-BNC, 25'
75

coax/BNC-BNC, 50'
75

coax/BNC-BNC, 75'
length to be specified

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

Redundancy "Y" Cable

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.


Table B-19: Redundancy Y-Cables
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


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Posted: Mon Jan 15 19:34:17 PST 2001
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