User's Manual 1094 Document #: LTRT-27045
Mediant 1000B Gateway & E-SBC
Parameter Description
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
[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: 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
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