Chapter 4 Hardware Troubleshooting

IES-5000 Series User’s Guide

70

4.0.3  No Voice on an ADSL Connection

The ADSL line cards allow the telephone wiring used for DSL connections to also 
simultaneously carry normal voice conversations.

4.0.4  No Voice on a VoIP Connection

Check the POTS and line card connections between the subscriber, the MDF(s) and the VOP 
line card. See your VOP User’s Guide for more information on troubleshooting VoIP 
problems.

4.0.5  Testing Wiring

Use the following tests if there is no voice. 

Systematically test wiring using a functioning telephone to determine if there is a wiring 
problem. If the connection is good, the telephone will return a dial tone. Letters in the figure 
shown next indicate the systematic tests to be done. Suppose you’re using installation scenario 
“B” as shown in the chapter on MDF connections. The logic for other scenarios should be 
similar.

Use steps A-D if there is no voice but you can transmit data. Use all of the steps if there is no 
voice and you cannot transmit data.

Table 7   

Voice Troubleshooting

STEP

CORRECTIVE ACTION

1

Make sure the subscriber has a POTS splitter properly installed.

2

Check the telephone wire connections between the subscriber and the MDF(s).

3

Check the telephone wire and connections between the MDF(s) and USER port(s). Refer 
to the pin assignments in the line card User’s Guide.

4

Check the telephone wire and connections between the MDF(s) and the CO port(s). Check 
the telephone wire mapping on the MDF(s).

5

Check the connection from the MDF(s) to the PBX or the telephone company PSTN or 
ISDN switch.

6

Make sure the in-house wiring works and is connected properly.

7

Repeat the steps above using a different DSL port.