CHAPTER72 Configuration Parameters Reference
Mediant 800 Gateway & E-SBC | User's Manual
Parameter Description
■ 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
[MinOverlapDigitsForRouti
ng]
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).
'Mute DTMF In Overlap'
configure voip >
gateway dtmf-supp-
service supp-
service-settings >
mute-dtmf-in-
overlap
[MuteDTMFInOverlap]
Enables the muting of in-band DTMF detection until the device
receives the complete destination number from the ISDN (for
Tel-to-IP calls). In other words, the device does not accept
DTMF digits received in the voice stream from the PSTN, but
only accepts digits from ISDN Info messages.
■ [0] Don't Mute (default).
■ [1] Mute DTMF in Overlap Dialing = The device ignores
in-band DTMF digits received during ISDN overlap dialing
(disables the DTMF in-band detector).
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