This section provides an application example (see Figure 40) based on the mobile backhaul reference model where Customer Edge 1 (CE1) is a base station controller (BSC), Provider Edge 1 (PE1) is a cell site router, PE2 is an M-series (aggregation) router, and CE2 is a BSC and Radio Network Controller (RNC). The Internet Engineering Task Force (RFC 3895) describes pseudowire as “a mechanism that emulates the essential attributes of a telecommunications service (such as a T1 leased line or Frame Relay) over a PSN” (Packet Switching Network).
Figure 40: Mobile Backhaul Application
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