AudioCodes MSBG Series User Manual

Version 7.2 543 Mediant 1000B Gateway & E-SBC
User's Manual 26. Configuring Supplementary Services
Note: The feature is applicable only to FXS interfaces.
26.6.3 Call Forward Reminder (Off-Hook) Special Dial Tone
The device plays a special dial tone (stutter dial tone - Tone Type #15) to a specific FXS
endpoint when the phone is off-hooked and when a third-party Application server (e.g., a
softswitch) is used to forward calls intended for the endpoint to another destination. This is
useful in that it reminds the FXS user of this service. The feature does not involve device
subscription (SIP SUBSCRIBE) to the Application server.
Activation/deactivation of the service is notified by the server. An unsolicited SIP NOTIFY
request is sent from the Application server to the device when the Call Forward service is
activated or de-activated. Depending on this NOTIFY request, the device plays either the
standard dial tone or the special dial tone for Call Forward.
For playing the special dial tone, the received SIP NOTIFY message must contain the
following headers:

From and To: contain the same information, indicating the specific endpoint

Event: "ua-profile"

Content-Type: "application/simservs+xml"

Message body is the XML body and contains the “dial-tone-pattern” set to "special-
condition-tone", which is the special tone indication:
<ss:dial-tone-pattern>special-condition-tone</ss:dial-tone-
pattern>
To cancel the special dial tone and playing the regular dial tone, the received SIP NOTIFY
message must contain the following headers:

From and To: contain the same information, indicating the specific endpoint

Event: ua-profile

Content-Type: "application/simservs+xml"

Message body is the XML body containing the “dial-tone-pattern” set to "standard-
condition-tone", which is the regular dial tone indication:
<ss:dial-tone-pattern>standard-condition-tone</ss:dial-tone-
pattern>
Therefore, the special dial tone is valid until another SIP NOTIFY is received that instructs
otherwise (as described above).
Note: If the MWI service is active, the MWI dial tone overrides this special Call
Forward dial tone.
26.6.4 Call Forward Reminder Dial Tone (Off-Hook) upon Spanish SIP
Alert-Info
The device plays a special dial tone to FXS phones in off-hook state that are activated with
the call forwarding service. The special dial tone is used as a result of the device receiving
a SIP NOTIFY message from a third-party softswitch providing the call forwarding service
with the following SIP Alert-Info header:

AudioCodes MSBG Series Specifications

General

Brand	AudioCodes
Model	MSBG Series
Category	Gateway
Language	English