[cisco-voip] fast tone

kevin k kds850 at gmail.com
Fri Feb 16 08:50:33 EST 2007


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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