[c-nsp] how codec transparent works?

[Roger Wiklund]

You probably want to post this in cisco-voip instead of nsp.

Why are you using H323 instead of SIP?
Is the 2800 a CUBE or voice gateway with TDM? Please explain the
setup/call flow?

Q. What is a transparent codec, and what does it do?
A. The Cisco Unified Border Element transparently passes capabilities
between endpoints. To configure this function in Cisco IOS Software, a
new codec type called the transparent codec is used.
The transparent codec is unique to the Cisco Unified Border Element.
Configuring codec transparent on the Cisco Unified Border Element
allows it to pass through codecs that it understands, but it does not
force the negotiation of any particular codec - codec negotiation is
left to the two endpoints. Only codecs that are supported on the Cisco
Unified Border Element can be passed between the two call legs.







On Sat, May 9, 2015 at 12:20 PM, s m <sam.gh1986 at gmail.com> wrote:
> hello everybody,
>
> anybody knows how codec transparent works?
>
> i have a strange problem. i want to set h323 trunk between asterisk and
> cisco 2800. it only works when i set codec transparent in dial-peer nodes.
> show commands in cisco shows that i have a call with g711alaw but if i set
> codec g711alaw in dial-peers, i do not have any success call. i know it is
> codec compatibility problem. is there any difference between g711 codecs
> which cisco and asterisk utilize? what happened when codec is set to
> transparent? dose anyone know anything about it?
>
> thanks is advance
> SAM
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