AudioCodes MediaPack MP-11 Series User Manual

User's Manual 462 Document #: LTRT-27045
Mediant 1000B Gateway & E-SBC
with the complete destination number (see ''Collecting ISDN Digits and Sending
Complete Number in SIP'' on page 462)
 Interworks ISDN overlap dialing with SIP, according to RFC 3578 (see ''Interworking
ISDN Overlap Dialing with SIP According to RFC 3578'' on page
463)
Note: ISDN overlap dialing is applicable to PRI and BRI.
21.7.1 Collecting ISDN Digits and Sending Complete Number in SIP
The device can support an overlap dialing mode whereby the device collects the called
party number digits from ISDN Q.931 Information messages or DTMF signals, and then
sends a SIP INVITE message to the IP side containing the complete destination number.
ISDN overlap dialing for incoming ISDN calls can be configured for the entire device or per
ISDN trunk. This is configured using the global, ISDNRxOverlap parameter or the
ISDNRxOverlap_x parameter (where x denotes the trunk number), respectively.
By default (see the ISDNINCallsBehavior parameter), the device plays a dial tone to the
ISDN user side when it receives an empty called number from the ISDN. In this scenario,
the device includes the Progress Indicator in the SetupAck ISDN message that it sends to
the ISDN side.
The device can also mute in-band DTMF detection until it receives the complete
destination number from the ISDN. This is configured using the MuteDTMFInOverlap
parameter. The Information digits can be sent in-band in the voice stream, or out-of-band
using Q.931 Information messages. If Q.931 Information messages are used, the DTMF in-
band detector must be disabled. Note that when at least one digit is received in the ISDN
Setup message, the device stops playing a dial tone.
The device stops collecting digits (from the ISDN) upon the following scenarios:
 The device receives a Sending Complete IE in the ISDN Setup or Information
messages, indicating no more digits.
 The timeout between received digits expires (configured by the TimeBetweenDigits
parameter).
 The maximum number of received digits has been reached (configured by the
MaxDigits parameter).
 A match is found with the defined digit map (configured by the DigitMapping
parameter).
Relevant parameters (described in ''PSTN Parameters'' on page 1074):
 ISDNRxOverlap_x = 1 (can be configured per trunk)
 TimeBetweenDigits
 MaxDigits
 MuteDTMFInOverlap
 DigitMapping
To configure ISDN overlap dialing using the Web interface, see ''Configuring Trunk
Settings'' on page 447.

AudioCodes MediaPack MP-11 Series Specifications

General

Brand	AudioCodes
Model	MediaPack MP-11 Series
Category	Gateway
Language	English