AudioCodes Mediant 500 MSBR, User Manual

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Version 7.2 1157 Mediant 500 MSBR
User's Manual 74. Configuration Parameters Reference
For IP-to-Tel calls, if the incoming SIP INVITE message includes
subaddress values in the 'isub' parameter for the Called Number (in the
Request-URI) and/or the Calling Number (in the From header), these
values are mapped to the outgoing ISDN Setup message.
If the incoming ISDN Setup message includes 'subaddress' values for
the Called Number and/or the Calling Number, these values are
mapped to the outgoing SIP INVITE message's ‘isub’ parameter in
accordance with RFC 4715.
configure voip > gateway
dtmf-supp-service supp-
service-settings > ignore-
isdn-subaddress
[IgnoreISDNSubaddress]
Determines whether the device ignores the Subaddress from the
incoming ISDN Called and Calling numbers when sending to IP.

[0] = (Default) If an incoming ISDN Q.931 Setup message contains a
Called/Calling Number Subaddress, the Subaddress is interworked
to the SIP 'isub' parameter according to RFC.

[1] = The device removes the ISDN Subaddress and does not
include the 'isub' parameter in the Request-URI and does not
process INVITEs with the parameter.
[ISUBNumberOfDigits] Defines the number of digits (from the end) that the device takes from
the called number (received from the IP) for the isub number (in the
sent ISDN Setup message). This feature is applicable only for IP-to-
ISDN calls.
The valid value range is 0 to 36. The default is 0.
This feature operates as follows:
1
If an isub parameter is received in the Request-URI, for example,
INVITE sip:9565645; isub =1234@host.domain:user=phone SIP/2.0
then the isub value is sent in the ISDN Setup message as the
destination subaddress.
2
If the isub parameter is not received in the user part of the Request-
URI, the device searches for it in the URI parameters of the To
header, for example,
To: "Alex" <sip: 9565645@host.domain;
isub =1234>
If present, the isub value is sent in the ISDN Setup message as the
destination subaddress.
3
If the isub parameter is not present in the Request-URI header nor
To header, the device does the following:

If the called number (that appears in the user part of the
Request-URI) starts with zero (0), for example,
INVITE sip:
0 5694564@host.domain:user=phone SIP/2.0
then the device maps this called number to the destination
number of the ISDN Setup message, and the destination
subaddress in this ISDN Setup message remains empty.

If the called number (that appears in the user part of the
Request-URI) does not start with zero, for example,
INVITE sip:5694564@host.domain:user=phone SIP/2.0
then the device maps this called number to the destination
number of the ISDN Setup message, and the destination
subaddress in this ISDN Setup message then contains
y digits
from the end of the called number. The y number of digits can
be configured using the ISUBNumberOfDigits parameter. The
default value of ISUBNumberOfDigits is 0, thus, if the parameter
is not configured, and 1) and 2) scenarios (described above)
have not provided an isub value, the subaddress remains empty.
Default Cause Mapping
From ISDN to SIP Defines a single default ISDN release cause that is used (in ISDN-to-IP
calls) instead of all received release causes, except when the following
Q.931 cause values are received: Normal Call Clearing (16), User Busy