Hssi Connector Signals; Hssi Interface Cable - Cisco 7000 Hardware Installation And Maintenance

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Table A-13 shows the signal pinouts for each type of E1-G.703/G.704 interface cable. All cables use
a 15-pin D-shell (DB-15) connector at the FSIP end.
Table A-13
FSIP End
DB-15
Pin
9
2
10
8
15
7
1. Any pins not described in this table are not connected.
2. Tx = transmit. Rx = receive.

HSSI Connector Signals

Two types of cables are available for use with the HIP: the HSSI interface cable used to connect the
HIP HSSI port with an external DSU (and HSSI network) and a null modem cable, which allows you
to connect two collocated routers back to back.

HSSI Interface Cable

The HSSI interface cable (Product Number CAB-HSI1) connects the HIP port with an external
DSU. The cable comprises 25 twisted pairs and a 50-pin SCSI-II-type plug at each end. Although
the HSSI cable is similar to a SCSI-II cable, it is not identical; you cannot substitute a SCSI-II cable
for a HSSI interface cable (see the following Caution).
Table A-14 lists the pin signals for the connector.
Caution
the HSSI cable specification is more stringent than that for a SCSI-II. We cannot guarantee proper
operation if a SCSI-II cable is used instead of an HSSI interface cable.
E1-G.703/G.704 Adapter Cable Connector Pinouts
Network End
Null Modem
1
DB-15
DB-15
2
Signal
Pin
Pin
Tx tip
1
3
Tx ring
9
11
Tx shield
2
4
Rx tip
3
1
Rx ring
11
9
Rx shield
4
2
Although the HIP connector and the HSSI interface cable are similar to SCSI-II format,
BNC
Twinax
Signal
Pin
Signal
Tx tip
J2-1
Tx
Tx shield
J2-2
Tx
J2 shield
Tx shield
Rx tip
J3-1
Rx
Rx shield
J3-2
Rx
J3 shield
Rx shield
HSSI Connector Signals
Cabling Specifications A-259

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