General QLPS Protocol Handler (GQPH)
The GQPH is a logical protocol handler that uses the PH33 hardware
type. The GQPH supports message routing between a SIP PH and the
SMP used for SIP call control. For outgoing messages sent from the
SMP to the SIP PH, the GQPH forwards messages to the serving PH.
For incoming calls, the GQPH forwards messages from the SIP PH to
one of the QLPSs, which then forwards the message to the correct
SM. The GQPH communicates with the QLPS network over logical
connections called GQPH Qpipes.Note: The GQPHs are only on the
non-DRM/VCDX.
Switching Module-2000 (SM-2000)
The SM-2000 provides IP packet trunking. The SMP terminal
processes coordinates establishing the signaling and bearer
connections between the originating and terminating network element.
The bearer terminal process selects the OFI-IP for the voice
connection. The signaling terminal process coordinates call
information between the two network elements.
Optical Interface Unit-Internet Protocol (OIU-IP)
The OIU-IP on the 5ESS
®
switch provides the packet network
interface for bearer traffic. Calls are switched in the time slot
interchange (TSI) and an optical facility interface-internet protocol
(OFI-IP) in the OIU-IP performs synchronous-to-asynchronous
conversion (SAC) to transport the voice stream from the TDM
network to the packet network.
The OFI-IP hardware control software interacts with the SM-2000
switching module processor (SMP) peripheral control using the
proprietary protocol. Real-time maintenance orders and reports are
also sent using the proprietary protocol to support OAM&P activities.
An OFI-IP protection group (PG) supports interconnection to an IP
edge router using OC-3c facilities with 1+1 automatic protection
switching (APS).
System View
Architecture
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2-14
Lucent Technologies 235-200-118
Issue 3.02B, March 2007
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