AT&T Synapse SB67020 User Manual page 151

Synapse SB67020/SB67025 Deskset User's Guide
Caller ID is not working. The display shows
for the phone number.
Probable Cause
Your organization does not
subscribe to caller ID service
or you have DSL phone lines
without filters installed.
Line Appearance Mode only — The Line Appearance key appears red for several seconds before the
Deskset rings and the incoming call screen appears.
Probable Cause
The line is a shared fax/voice
line.
Extension Monitor key does not flash for incoming calls.
Probable Cause
The system is in Line
Appearance mode.
Troubleshooting
and a digit for the name, and the same digit
 Phone# 
Corrective Action
Caller ID is a subscription service. You must

subscribe to this service from your local
telephone service provider for this feature to
work on your phone.
The caller must be calling from an area that

supports caller ID.
Both you and your caller's telephone companies

must use caller ID compatible equipment.
If you have DSL phone lines, confirm that you

have a DSL filter plugged in between each
Deskset and DSL wall jack. The DSL filter must be
plugged into the wall jack, not the Gateway.
Corrective Action
None. The line appears busy during the fax

detection period, during which the system
determines where to route the incoming call. If
the system detects incoming fax tones, it routes
the call to the fax machine. If no fax signal is
detected, your Deskset rings.
Corrective Action
None. In Line Appearance mode, the Extension
Monitor key LED flashes green for an incoming call
when:
the call is on the Intercom line

an external call is forwarded to an extension

through a Call Forward-No Answer setting
an external call is transferred to an extension.

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