2 of 2 wyousif
CET 2675C
Voice over IP
Skills Exam –Final
Scenario:
Company XYZ has two locations: One in Orlando and another in Miami. The company decided to implement end-to-end IP Telephony using the Centralized Call Processing model. One CallManger will be deployed in the Orlando office to process calls for the two locations. However, the company decided to Implement Survivable Remote Site Telephony on the Miami router to process calls for the Miami office phones in case the WAN connection is down and the connection to the CM is lost.
Due to the low speed WAN connection (fractional T1 line @ 256 Kbps), the company must implement Quality of Service on the WAN link using Resource Reservation Protocol. Also Phone calls between the two locations and across the WAN link must use the G.729 codec.
Since the Miami office must maintain voice communication with the Orlando office at all times, a connection to the PSTN will be used as a backup to route calls to the Orlando office despite toll charges.
The two FXS ports will be used to simulate the connection to the PSTN. When the WAN is up users dial the phones at the Orlando office using the extension number only, However, when users at the Miami office realize that the WAN connection is lost “should be noticed from the CM backup message displayed on the LCDs of their phones”, eleven-digit dialing is used to call the Orlando office.
Configuration Tasks
1. Configure the CM server with the correct IP address “ Make sure that you restart the server when done”
2. Configure the two routers and make sure that routing “using RIP” is working and that there is an end-to-end connectivity between the two LANs “Make sure that you use the exact IP addressing provided in the topology.
3. Configure and a Region and a Device Pool for the Miami location.
4. Make sure that device registration is done manually for both locations and that the directory numbers match those provided on the topology.
5. Configure Router2 with DHCP services so it can lease IP addresses to the Miami LAN
6. Configure Router2 with the Survivable Remote Site Telephony Service
7. Configure Router2 with the proper dial peers so it would be able to route eleven-digit-dialing calls to PSTN when the WAN link is down.