Installation guide

Synapse Installation Guide Back to Contents
Installation 29
For more information, see the Synapse Administrator’s Guide at
www.telephones.att.com/synapseguides.
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 8 seconds before the
call is connected to the Auto Attendant or Operator. In addition, during the delay,
the ringback tone generated by the CO (Central Office) is no longer heard by the
caller. Instead, the caller hears the ringback tone generated by the Gateway.
 For outgoing calls, the caller ID of the fax number may be sent instead of the
primary business telephone number. If the recipient returns a missed call via their
caller ID log, the caller will then experience the 8-second delay mentioned
above.
T1 Gateway and SIP Gateway
When a T1 Gateway and/or SIP Gateway is installed, you can assign a DID number for
the fax machine on the DID Assignments WebUI page. Incoming faxes are routed
directly to that DID number (with no 8-second delay).