
Chapter 10 Migrating to an IP Telephony Network
Simple IP Network Migration Sequence
10-4
Cisco IP Telephony Network Design Guide
78-11103-03
Figure 10-2 Initial Conventional Voice Network
Figure 10-3 shows the migration phase, with users moving in blocks from PBX to
IP network.
Figure 10-3 Migration Phase
Figure 10-4 shows the network when migration is completed and the PBX is
retired.
PSTN
PBX
Voice
messaging
system
40835
PSTN
PSTN
PBX LAN
Gateway
Pilot user
migration
Gateway
Voice
messaging
system
V
V
IP
IP
IP
40836
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