User's Manual 1168 Document #: LTRT-10532
Mediant 500L Gateway & E-SBC
Parameter Description
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
[MinOverlapDigitsForRoutin
g]
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, the device sends a SIP 200 OK response to maintain the
current dialog session and to receive additional digits from
subsequent INFOs.
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).
Select type of Overlap
Receiving
configure voip > interface
e1-t1|bri > ovrlp-rcving-type
[ISDNRxOverlap_x]
Determines the receiving (Rx) type of ISDN overlap dialing for Tel-to-
IP calls, per trunk.
[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
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