User`s guide

System Troubleshooting and Diagnostics

5.7 Using Loopback Tests to Isolate Failures

Table 5–5 Loopback Connectors for Common Devices

Device Module Loopback Cable Loopback

CXA16/CXB16 H3103 + H8572

–

CXY08 H3046 (50-pin) H3197 (25-pin)

DIV32 H3072 –

DPV11 12–15336–10 or H325 H329 (12–27351–01)

DRQB3 – 17–01481–01 (from port 1 to

port 2)

DRV1W 70–24767–01 –

DZQ11 12–15336–10 or H325 H329 (12–27351–01)

Ethernet

––

IBQ01 IBQ01–TA –

IEQ11 17–01988–01 –

KA52 H3103 H3103 + H8572

KFQSA DSSI terminators –

KMV1A H3255 H3251

KZQSA 12–30552–01 –

LPV11 12–15336–11 –

Use the appropriate cable to connect transmit-to-receive lines. H3101 and H3103 are double-

ended cable connectors.

For ThinWire, use H8223–00 plus two H8225–00 terminators. For standard Ethernet, use

12–22196–02.

5–64 System Troubleshooting and Diagnostics