AudioCodes Mediant 500 MSBR, User Manual

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Version 7.2 1153 Mediant 500 MSBR
User's Manual 74. Configuration Parameters Reference
Table 74-61: ISDN and CAS Interworking Parameters
Parameter Description
ISDN Parameters
Send Local Time To
ISDN Connect
[SendLocalTimeToISDN
Connect]
Determines the device's handling of the date and time sent in the ISDN
Connect message (Date / Time IE) upon receipt of SIP 200 OK
messages.

[0] Disable = (Default) If the SIP 200 OK includes the Date header,
the device sends its value in the ISDN Connect Date / Time IE. If the
200 OK does not include this header, it does not add the Date / Time
IE to the sent ISDN Connect message.

[1] Enable = If the SIP 200 OK includes the Date header, the device
sends its value (i.e. date and time) in the ISDN Connect Date / Time
IE. If the 200 OK does not include this header, the device uses its
internal, local date and time for the Date / Time IE, which it adds to
the sent ISDN Connect message.

[2] Always Send Local Date and Time = The device always sends its
local date and time (obtained from its internal clock) to PBXs in ISDN
Q.931 Connect messages (Date / Time IE). It does this regardless of
whether or not the incoming SIP 200 OK includes the Date header. If
the SIP 200 OK includes the Date header, the device ignores its
value.
Note:

This feature is applicable only to Tel-to-IP calls.

For IP-to-Tel calls, the parameter is not applicable. Only if the
incoming ISDN Connect message contains the Date / Time IE does
the device add the Date header to the sent SIP 200 OK message.
Min Routing Overlap
Digits
configure voip > gateway
dtmf-supp-service dtmf-
and-dialing > min-dg-b4-
routing
[MinOverlapDigitsForRou
ting]
Defines the minimum number of overlap digits to collect (for ISDN
overlap dialing) before sending the first SIP message for routing Tel-to-
IP calls.
The valid value range is 0 to 49. The default is 1.
Note: The parameter is applicable when the ISDNRxOverlap parameter
is set to [2] or [3].
ISDN Overlap IP to Tel
Dialing
configure voip > gateway
dtmf-supp-service dtmf-
and-dialing > isdn-tx-
overlap
[ISDNTxOverlap]
Enables ISDN overlap dialing for IP-to-Tel calls. This feature is part of
ISDN-to-SIP overlap dialing according to RFC 3578.

[0] Disable (default)

[1] Through SIP = The device sends the first received digits from the
initial INVITE to the Tel side in an ISDN Setup message. For each
subsequently received re-INVITE message of the same dialog
session, the device sends the collected digits to the Tel side in ISDN
Info Q.931 messages. For each received re-INVITE, the device
sends a SIP 484 Address Incomplete response to maintain the
current dialog session and to receive additional digits from
subsequent re-INVITEs.

[2] Through SIP INFO = The device sends the first received digits
from the initial INVITE to the Tel side in an ISDN Setup message
and then responds to the IP side with a SIP 183. For each
subsequently received SIP INFO message with additional digits of
the same dialog session, the device sends the collected digits to the
Tel side in ISDN Info Q.931 messages. For each received SIP INFO,