SIP for Packet Trunking
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Platform definition
Session Initiation Protocol (SIP) is a method of establishing,
maintaining, and terminating internet sessions. These sessions
interactively exchange real-time multimedia data (voice, text, and
video) between multiple participants. SIP is based on a client-server
model with intelligent end-points. End servers respond to session
initiation requests and locate the called parties. SIP is an application
layer protocol that can run on top of different transport protocols.
Feature descriptions
The SIP for Packet Trunking - NAR (99-5E-8382) feature adds a SIP
packet trunking interface to the 5ESS
®
switch. This feature allows the
5ESS
®
switch to operate as a gateway for interworking between the
time division multiplexing (TDM)-based public switched telephone
network (PSTN) trunks and the next-generation internet protocol (IP)
network virtual trunks. It interworks current circuit signaling
protocols, such as Signaling System 7 (SS7) integrated services user
part (ISUP), multifrequency (MF), or dual tone multifrequency
(DTMF), with SIP trunk signaling over IP networks.
The SIP signaling protocol for telephony is the packet signaling
protocol used to establish calls using the Optical Interface Unit -
Internet Protocol (OIU-IP).
The SIP for Packet Trunking feature contains:
• two new PSU2 protocol handlers (SIP-PH and the GQPH) for
setting up the SIP signaling connection,
• a new lower layer transport protocol, Stream Control
Transmission Protocol (SCTP), and
• integrated operations, administration, maintenance and
provisioning (OAM&P) using the conventional 5ESS
®
switch
interfaces.
Automatic ACM Timer - is a modification to the 99-5E-8382 feature
being implemented in software release 5E16.2 FR6. The Automatic
address complete message (ACM) timer is a new field on RC/V 5.82.
The timer value ranges from 4-14 seconds, with 14 seconds as the
default. This timer is started at the originating packet switch (OPS) by
the SIP terminal process when an INVITE message is sent to a
terminating packet switch (TPS). If the timer expires, the SIP
Terminal Process generates a default ISUP ACM that is sent to the
Overview
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Lucent Technologies 235-200-118
Issue 3.02B, March 2007
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