Chapter 4 Hardware Troubleshooting

IES-6000M User’s Guide

67

Figure 44   

Testing In-house Wiring

Table 3   

Testing In-house Wiring

STEP

TEST

A

Wiring problem between the CO and MDF 1.

Connect a standard telephone to MDF 1. If there is no dial tone, then a problem with the wire 
or wire connections between MDF 1 and the CO exists. Contact your telephone company for 
troubleshooting.

B

Wiring problem between MDF 1 and MDF 2.

Connect a telephone to the upper port of MDF 2. If there is no dial tone, then the problem is 
between MDF 1 and MDF 2. Check the telephone wire and connections between MDFs 1 
and 2.

C

Wiring problem between MDF 2 and the USER Telco-50 connector on the splitter 
chassis.

Disconnect the Telco-50 cable from the splitter chassis’ Telco-50 CO connector. Connect a 
telephone to the appropriate pins of the Telco-50 cable’s Telco-50 connector.
If there is no dial tone, then the problem is between the splitter chassis Telco-50 CO 
connector and MDF 2. 
Check the Telco-50 cable’s pin assignments (refer to the line card User’s Guide for the proper 
pin assignments). Replace the Telco-50 cable if the pin assignments are okay and there is 
still no dial tone.