Installation guide
Synapse Installation Guide Back to Contents
Installation 28
ATA Fax Line Configuration
To support fax on the Synapse system, you should consider where the fax is, and which
telephone line will be used for incoming faxes. Fax line configuration for the Synapse
system differs depending on whether you are using a PSTN Gateway or a T1 or
SIP Gateway.
For more information about fax configuration and ATA configuration, see the
Synapse Administrator’s Guide at
www.telephones.att.com/synapseguides.
Figure 10. Fax Machine Connected to FXS Port
PSTN Gateway
The PSTN fax line can be connected to any FXO port (LINE 1–4) on the PSTN Gateway.
However, trunks for outgoing calls are seized in ascending order (LINE 1 then LINE 2,
and so on). To avoid using the fax line for outgoing voice calls, make the fax line the
highest possible numbered line on the highest numbered Gateway. Use the Fax
Configuration page in the WebUI to select a telephone line on the PSTN Gateway as
the fax line.
If your office has heavy fax volume, the fax line should be a separate dedicated line, and
not part of a hunt group.
Call Appearance mode only—If your office has low fax volume, your telephone service
provider may be able to include your fax line in the hunt group. This way, you can save
on the expense of a separate fax line. In this scenario, you can maximize your system for
voice usage while maintaining the capacity to send or receive the occasional fax.
You should consider the following issues when fax and voice calls share a PSTN Gateway
line:
Incoming calls that get routed through the PSTN Gateway fax line are
automatically checked by the system for a fax signal. If the system detects
incoming fax tones, it routes the call through the configured ATA FXS port to the
fax machine. Voice callers will experience a delay of up to eight seconds before
the call is connected to the Auto Attendant or Operator. In addition, during the
Line Appearance mode only—Do not assign the PSTN fax line to any
Programmable Feature Keys on Desksets.
For more information, see the Synapse Administrator’s Guide at
www.telephones.att.com/synapseguides.