Cisco Design Essentials: Cisco IP Telephony

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Cisco Design Essentials: Cisco IP Telephony

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· Solution A: Use a central CallManager (perhaps redundant CallManagers) with each office being a separate region. Intra-region calls can be G.711, but inter-region calls can be G.729 (unless to voice mail). Limit WAN bandwidth at each egress point and block calls that will exceed that level. · Solution B: Put a CallManager in each location and network them together using H.323 (running on a Cisco IOS gatekeeper). You can then use the zone bandwidth feature to limit the number of calls and force overflow to the Pub lic Switched Telephone Network (PSTN)....

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