4000 Router Series Interface Module Guide

153

Product

number

Cable Appearance

Applicable

models

JF826A

RS-449

DCE

cable

1 x D28 < ---- > 1 x D37 (female)

JF827A

RS-530

DTE

cable

1 x D25 (male) < ---- > 1 x D28

JF828A

RS-530

DCE

cable

1 x D25 (female) < ---- > 1 x D28

Connecting the cable

1. Check port type of the peer device and choose the synchronous serial interface cable of correct

type.

2. Plug the D28 end of the synchronous serial interface cable into the D28 interface of the SAE

interface module.

3. If the WAN uses DDN line, connect the cable to the port of CSU/DSU.

4. Check the LINK LED on the SAE panel.

• If the LED is on, a link is present.

• If the LED is off, a fault has occurred on the link and signal is out of synchronization. In this case,

check the link.