[cisco-voip] Configure Cisco 871 Branch Office VoIP

[Robert Kulagowski]

> "If you want to track MoS and other IP voice related statistics, you may 
> want to implement IP SLA"
>  
> Could you provide any suggestions about IP SLA, it's possible track MoS 
> for Voice over Internet?

At your central site (10.255.1.5), you'd put something like:
ip sla monitor responder

At a remote site, you could:
ip sla 10
  udp-jitter 10.255.1.5 16384 codec g729a
ip sla schedule 10 life forever start-time now

You could then do:
# sh ip sla stat

Round Trip Time (RTT) for       Index 10
         Latest RTT: 209 milliseconds
Latest operation start time: 07:26:32.224 AEDT Tue Nov 21 2006
Latest operation return code: OK
RTT Values:
         Number Of RTT: 1000             RTT Min/Avg/Max: 204/209/314 
milliseconds
Latency one-way time:
         Number of Latency one-way Samples: 1000
         Source to Destination Latency one way Min/Avg/Max: 104/104/107 
milliseconds
         Destination to Source Latency one way Min/Avg/Max: 100/105/209 
milliseconds
Jitter Time:
         Number of Jitter Samples: 999
         Source to Destination Jitter Min/Avg/Max: 1/1/3 milliseconds
         Destination to Source Jitter Min/Avg/Max: 1/5/105 milliseconds
Packet Loss Values:
         Loss Source to Destination: 0           Loss Destination to 
Source: 0
         Out Of Sequence: 0      Tail Drop: 0    Packet Late Arrival: 0
Voice Score Values:
         Calculated Planning Impairment Factor (ICPIF): 14
MOS score: 3.96
Number of successes: 43
Number of failures: 0
Operation time to live: Forever

Which shows me that my calls to Sydney would be pretty good.