[c-nsp] how codec transparent works?

[s m]

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