IES-1248-51/51A/53 User’s Guide
Chapter 58 Troubleshooting 435
Figure 305 Testing In-house Wiring
Table 111 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 449 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 449 for the proper pin assignments).
If there is no dial tone, your device’s internal splitter may be faulty, contact your vendor.
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