Configuring Music on Hold
Configuring a Streaming Audio Server
Cisco Small Business ATA Administration Guide
89
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After you complete the required configuration, the FXS port is ready to stream
audio. The functionality depends on the hook state of the FXS port:
•
If the FXS port is off hook, an incoming call is answered automatically and
audio is streamed to the calling party.
NOTE
Each SAS server can maintain up to five simultaneous calls. If the
second line on the unit is disabled, then the SAS line can maintain up
to 10 simultaneous calls. Further incoming calls receive a busy signal
(SIP 486 Response).
•
If the FXS port is on-hook when the incoming call arrives, a SIP 503 response
code is transmitted to indicate “Service Not Available.”
•
If an incoming call is auto-answered, but later the FXS port changes to on-hook,
the call is not terminated but continues to stream silence packets to the caller.
•
The SAS line can be set up to refresh each streaming audio session
periodically using a SIP re-INVITE message, which detects if the connection to
the caller is down. If the caller does not respond to the refresh message, the
SAS line terminates the call so that the streaming resource can be used for
other callers.
Additional information:
•
The SAS line does not ring for incoming calls even if the attached equipment is
on-hook.
•
If no calls are in session, battery is removed from tip-and-ring of the FXS port.
Some audio source devices have an LED to indicate the battery status. This can
be used as a visual indication as to whether audio streaming is in progress.
•
Call Forwarding, Call Screening, Call Blocking, DND, and Caller-ID Delivery
features are not available on an SAS line.
