CHAPTER 3. SIP Gateway Management
354
© SAMSUNG Electronics Co., Ltd.
Gateway Features
SIP Gateway provides the following features:
y
Support early media session.
y
Support out of band DTMF relay.
y
Support for Reliability of provisional response in SIP
y
Ability to specify the maximum number of SIP redirects.
y
Ability to specify SIP on a dial-peer basis.
y
Configurable SIP transaction timers.
y
Support for a variety of signaling protocols, including ISDN, PRI, and
channel associated signaling(CAS).
y
Support for a variety of interfaces, including
−
Analog interfaces: Foreign Exchange Station(FXS)/Foreign Exchange
Office(FXO)/recEive and transMit(E & M) analog interfaces.
−
Digital interfaces: T1 CAS, T1 PRI, E1 CAS, E1 PRI, and E1 R2
y
Support for SIP redirection messages and interaction with SIP proxies.
The gateway can redirect an unanswered call to another SIP gateway or SIP-
enabled IP phone. In addition, the gateway supports proxy-routed calls.
y
Support for SIP over TCP and User Datagram Protocol(UDP).
y
Support RTP/RTCP for media transport in VoIP networks.
y
Support for the following codecs:
−
G711ulaw
−
G711alaw
−
G723
−
G726-32
−
G729
y
Support for record-route headers.
y
Support for IP quality of service(QoS) and IP precedence.
y
Support S/MIME, SRTP, IP Security(IPSec) for secure SIP signaling.
y
Authentication, authorization, and accounting(AAA) support.
For accounting, the gateway device generates call data record(CDR)
accounting records for export. For authentication, the SIP gateway sends
validation requests to the AAA server. For authorization, the existing access
lists are used.
y
Support for configurable expiration time for SIP REGISTERs and
maximum number of proxies or redirect servers that can forward a SIP
request.
Summary of Contents for Ubigate iBG2016
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