VoIP on FR Issue

[nkariyawasam]

I have VoIP installation, with 40 branches linked to head office via FR start-topology PVC links each with 64K CIR.

Each branch having 2 analog phones attaches to branch router 1751-V.

Voice trafic for each branch has given priority and has allocated 48K bandwidth for voice on each PVC.

Some branches experiencing intermittant voice quality problems.

Q1. Suppose if a branch link is having two on-going voice conversations. If a third call trie to enter the link can it cause the voice quality problem bencause the link cannot handle 3 calls ?

Q2. Will installing a voice gateway to do call admission controll at the head office will solve the problem ?

[jtufail]

Answer to your Q1 is yes. The third call will affect the two active simultaneous calls. You should make sure the priority you have defined is enough for the active calls that you expect simultaneouosly.

Check the following URL:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1830/products_feature_guide09186a0080087b13.html

For CAC you can either use

1. RSVP or

2. Gatekeeper solution

I hope that helps

Javed

[cgregg]

Couldn't you also use the max-conn command to limit the calls to only 2??

Curt