module (AM) is the integrated element management system (EMS) of
the 5ESS
®
switch and provides the interface to the operations support
systems (OSSs). The OSS network includes the circuit OSS products
for traditional public switched telephone network (PSTN) equipment.
Communication Module (CM)
The CM hardware remains unchanged. The CM consists of the
message switch (MSGS) and the time multiplexed switch (TMS).
The communication module processor (CMP) is one of several
functions within the MSGS. To support the SIP feature, the CMP
selects an SM-2000 to process SIP call signaling for outgoing calls
when destined for routes over packet groups controlled by SIP
signaling. The CMP also selects the SM-2000 with an available
OIU-IP for the bearer connection for both incoming and outgoing
calls. Note: The CMP functions for SIP on the non-DRM/VCDX
described here are carried out on the Switching Module Processor
(SMP) for SIP on the DRM (other than selecting an SM, which isn’t
required on DRM, since there is only the one SM).
Within the TMS, the quad link packet switch (QLPS) terminates
QLPS endpoints, e.g. message handlers (MHs). SIP introduces the
GQPH which is a new QLPS endpoint. Messages are sent between the
QLPS and GQPH over a logical connection called a GQPH Qpipe.
Connections between the GQPH and the call processing SMs are
established over QLPS logical links. These connections are used to
carry SIP related signaling messages between the SMs and the SIP
PHs. The fabric of the TMS is used when different SMs are used for
the TDM and IP bearer connections. In addition, any messaging
between two SMs and between an SM and the AM goes through the
CM. Note: This paragraph only applies to non-DRM/VCDX, there is
no QLPS or GQPHs on the DRM/VCDX.
Global Switching Module-2000 (GSM-2000)
The GSM-2000 supports the PSU2. It is recommended that this
module be set-up to provide only signaling.
Below is a partial list of status tracked by the GSM-2000 when
supporting the SIP feature:
• SIP PHs,
• Ethernet links,
• processor groups,
System View
Architecture
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2-12
Lucent Technologies 235-200-118
Issue 3.02B, March 2007
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