same network. Figure 3-4, “Network Connections” (3-8), illustrates
connections to separate IP networks.
Signaling connection
The signaling connection is only provided by an SM-2000. A
100BaseT Ethernet connection passes the signaling messages between
the edge router and the SIP PH in the packet switching unit model 2
(PSU2).
Bearer connection
The bearer connection is only provided by an SM-2000 that has
optical facility interface-internet protocol (OFI-IP) boards in the OIU.
It is the OFI-IP in an OIU that provides the synchronous to
asynchronous conversion between TDM bearer flows and IP bearer
flows.
Figure 3-4 Network Connections
Network Architecture
Call Flow
....................................................................................................................................................................................................................................
3-8
Lucent Technologies 235-200-118
Issue 3.02B, March 2007
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