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Chapter 55 Troubleshooting
IES-612-51A User’s Guide
409
55.6 There Is No Voice on a DSL Connection
The IES-612-51A has internal splitters and CO side Telco-50 connectors that allow the
telephone wiring used for DSL connections to also simultaneously carry normal voice
conversations.
55.7 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.
4 If you cannot ping, connect a DSL modem to a DSL port (that is known to work).
If the DSL modem or router works with a different DSL port, there may be a problem with
the original port. Contact the distributor.
5 If using a different port does not work, try a different DSL modem or router with the
original port.
Table 103 DSL Data Transmission Troubleshooting (continued)
STEPS CORRECTIVE ACTION
Table 104 DSL Voice Troubleshooting
STEP CORRECTIVE ACTION
1 Make sure the subscriber has a splitter properly installed.
2 Check the DSL line pin assignments shown in Section 56.5 on page 425.
3 Check the telephone wire connections between the subscriber and the MDF(s).
4 Check the telephone wire and connections between the MDF(s) and USER port(s).
5 Check the telephone wire and connections between the MDF(s) and the CO
connector(s). Check the connection from the MDF(s) to the telephone company or the
PBX.
6 Check the telephone wire mapping on the MDF(s).
7 Make sure the in-house wiring works and is connected properly.
8 Repeat the steps above using a different DSL port.
Table 105 Wiring Tests
TEST DESCRIPTION
A. Test A determines if there is a wiring problem between the TELCO (telephone company)
and MDF 1.
B. Test B determines if there is a wiring problem between MDF 1 and MDF 2.
C. Test C determines if there is a wiring problem between MDF 2 and your device.
D. Test D determines if there is a problem with your device’s internal splitter.