Version 6.6 635 Mediant 2000
User's Manual 45. Configuration Parameters Reference
45.11.7 ISDN and CAS Interworking Parameters
The ISDN and CAS interworking parameters are described in the table below.
ISDN and CAS Interworking Parameters
Parameter Description
ISDN Parameters
Web: Send Local Time
To ISDN Connect
[SendLocalTimeToISD
NConnect]
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.
Notes:
 This feature is applicable only to Tel-to-IP calls.
 For IP-to-Tel calls, this 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.
Web/EMS: Min Routing
Overlap Digits
[MinOverlapDigitsForR
outing]
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:
This parameter is applicable when the ISDNRxOverlap parameter
is set to [2].
Web/EMS: ISDN Overlap
IP to Tel Dialing
[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] Enable
When enabled, for each received INVITE of the same dialog session,
the device sends an ISDN Setup (and subsequent ISDN Info Q.931
messages) with the collected digits to the Tel side. For all subsequent
INVITEs received, the device sends a SIP 484 Address Incomplete
response in order to maintain the current dialog session and receive
additional digits from subsequent INVITEs.
Note: When IP-to-Tel overlap dialing is enabled, to send ISDN Setup
messages without the Sending Complete IE, the ISDNOutCallsBehavior
parameter must be set to USER SENDING COMPLETE (2).
Determines the receiving (Rx) type of ISDN overlap dialing for Tel-to-IP
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