[cisco-voip] fast tone

[Robin Inderberg]

Hi Kevin,

 

Can you describe your environment a little better please?

Are you using a backhauled MGCP PRI gateway? Do you have any gatekeepers? 

Have you checked how many lines  you are using? E1 30 lines, T1 23.

Have you checked your GW-logs, does can you setup debug isdn q931 and see what you gw says at the certain time of failure? 

 

Please answer these questions, 

 

 

Med vänliga hälsningar/Best Regards

 

Robin Inderberg

robin.inderberg at candidator.se <mailto:robin.inderberg at candidator.se> 

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Från: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] För kevin k
Skickat: den 16 februari 2007 14:51
Till: cisco-voip at puck.nether.net
Ämne: [cisco-voip] fast tone

 

today and many times before i had users complain they get fast tone.  they dial number and get the fast tone.  it seems to be only for outgoing call.  to be sure i advised them to write down time and called number.

what is causing that?

per "cisco callmanager fundamental", read below.

if it is bandwidth issue, which bandwidth?
phone to vg?
vg to pri?

how can i see it?

thanks guys in advance. 

 

 

Like IP precedence, regions play an important role in ensuring the quality of voice calls within your network. Regions allow you to constrain the codecs selected when one device calls another. Most often, you use regions to limit the bandwidth used when calls are placed between devices connected by an IP WAN. However, you can also use regions as a way of providing higher voice quality at the expense of network bandwidth for a preferred class of users.

When you define a new region, Cisco CallManager Administration asks you to define the compression type used for calls between devices within the region. You also define, on a region-by-region basis, compression types used for calls between the region you are creating and all other regions.

You associate regions with device pools. All devices contained in a given device pool belong to the region associated with that device pool. When an endpoint in one device pool calls an endpoint in another, the codec used is constrained to what is defined in the region. If, for some reason, one of the endpoints in the call cannot encode the voice stream according to the specified codec, CallManager attempts to introduce a transcoder (see Chapter 5) to allow the endpoints to communicate."

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