AT&T SB67030 Administrator's Manual page 266

Symptom
Analog phone connected to
FXS port does not work as
expected. (Continued)
Troubleshooting
Synapse Administrator's Guide
Probable Cause
Analog phone is working
with Synapse, but does not
have Deskset capabilities.
Corrective Action
Consider the analog phone limitations:
To make outgoing calls on an analog phone
connected to the FXS port on the ATA, the outside
phone number must be preceded by 9 or whatever
digit, if any, that must be dialed first for an outside call
(same as on a Deskset).
The analog phone connected to the FXS port on the
ATA can pick up incoming calls and make outgoing
calls. Idle, Ringing, Dial, caller ID, and Active states are
all supported, but advanced features such as Call
Waiting, Call Forward, Hold, Transfer, DND, Paging,
Park, and Voicemail are not supported on analog
phones. See "[ATA] Analog Telephone Overview" on
page 161 for a complete list of features.
266
ATA Analog Phone