Version 6.4 699 March 2012
SIP User's Manual A. Configuration Parameters Reference
Parameter Description
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.
Note: 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
[MinOverlapDigitsForRouting]
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).
Web: Enable Receiving of Overlap
Dialing
[ISDNRxOverlap_x]
Determines the receiving (Rx) type of ISDN overlap dialing for
Tel-to-IP calls.
[0] None (default) = Disabled.
[1] Local receiving = ISDN Overlap Dialing - the complete
number is sent in the INVITE Request-URI user part. The
device receives ISDN called number that is sent in the
'Overlap' mode. The ISDN Setup message is sent to IP only
after the number (including the Sending Complete IE) is fully
received (via Setup and/or subsequent Info Q.931
messages). In other words, the device waits until it has
received all the ISDN signaling messages containing parts
of the called number, and only then it sends a SIP INVITE
with the entire called number in the Request-URI.
[2] Through SIP = Interworking of ISDN Overlap Dialing to
SIP, based on RFC 3578. The device interworks ISDN to
SIP by sending digits each time they are received (from
Setup and subsequent Info Q.931 messages) to the IP,
using subsequent SIP INVITE messages.
Notes:
When option [2] is configured, you can define the minimum
number of overlap digits to collect before sending the first
SIP message for routing the call, using the
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