AT&T SB67030 User Manual page 267

Symptom
On outside calls, I hear an
excessive echo at the
Deskset.
I cannot retrieve parked
calls.
You hear static, sudden
silences, gaps in speech, or
garbled speech.
Troubleshooting
Synapse SB67030 and Accessories User's Guide
Probable Cause
The automatic PSTN
Gateway line calibration did
not run properly.
The first digit of an extension
number matches the first
digit of parked calls.
You may be experiencing
network problems.
Corrective Action
There may be non-system equipment connected in

parallel to the telephone line.
. See "To resolve audio echo issues" in the Synapse
Administrator's Guide at
www.telephones.att.com/
synapseguides
Your system administrator may have to correct your Dial

Plan. Do not have extension numbers whose first digits
match the park extension prefix. Log into the WebUI as
administrator, click System Settings, then Dial Plan
Settings.
Your LAN administrator should ensure the following

minimum guidelines are met:
A switched network topology is recommended (using

standard 10/100 Ethernet switches that carry traffic
at a nominal rate of 100 Mbit/s).
The office network infrastructure should use Cat5

wiring.
Do not connect a network server PC to the PC port on the

Deskset.
Make sure the network cable is solidly plugged in. If you

tug on the cable, the plug should remain inserted.
267
Calls Generally
.