Testing Wiring; Table 110 Wiring Tests - ZyXEL Communications IES-1248-51 User Manual

IES-1248-51/51A/53 User's Guide
Table 109 ADSL Voice Troubleshooting (continued)
STEP
5
6
7
8

58.8 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 110 Wiring Tests

TEST
A.
B.
C.
D.
E.
F.
434
CORRECTIVE ACTION
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.
Check the telephone wire mapping on the MDF(s).
Make sure the in-house wiring works and is connected properly.
Repeat the steps above using a different ADSL port.
DESCRIPTION
Test A determines if there is a wiring problem between the TELCO (telephone company)
and MDF 1.
Test B determines if there is a wiring problem between MDF 1 and MDF 2.
Test C determines if there is a wiring problem between MDF 2 and your device.
Test D determines if there is a problem with your device's internal splitter.
Test E determines if there is a wiring problem between your device and MDF 3.
Test F determines if there is a building-wiring problem between the subscriber's wall jack
and MDF 3.
Chapter 58 Troubleshooting