ZyXEL Communications IES-1248-51, User Manual

Page: 363 / 385

IES-1248-51 User’s Guide
Chapter 51 Troubleshooting 363
Figure 253 Testing In-house Wiring
Table 89 Testing In-house Wiring
STEP TEST
A 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 TELCO exists. Contact your telephone
company for troubleshooting.
B 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 Disconnect the telephone wire from CO . Connect a telephone to the telephone wire.
If there is no dial tone, then the problem is between your device and MDF 2.
Check the telephone wire’s pin assignments (see
Appendix C on page 375 for the proper
pin assignments). Replace the telephone wire if the pin assignments are OK and there is
still no dial tone.
D Reconnect the telephone wire to CO .
Disconnect the telephone wire from USER . Connect a telephone to USER (see Appendix
C on page 375 for the proper pin assignments).
If there is no dial tone, your device’s internal splitter may be faulty, contact your vendor.