Re: [AVT] MS x CLEARMODE
"Schwarz Albrecht" <Albrecht.Schwarz@alcatel-lucent.de> Mon, 18 February 2008 14:31 UTC
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Thread-Topic: [AVT] MS x CLEARMODE
Thread-Index: Achww7R5LETRlQsESO2UC9jkuZcbSwBdYXmA
From: Schwarz Albrecht <Albrecht.Schwarz@alcatel-lucent.de>
To: Jose Yukio Akazawa <jose.yukio.akazawa@ericsson.com>, avt@ietf.org
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Subject: Re: [AVT] MS x CLEARMODE
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Like to clarify that the majority of "TISPAN gateways" MUST support RTP
clearmode:
see ES 283 002 for RGWs and AGWs
see ES 283 024 for TGWs
see ES 283 018 for BGWs ("CMD/RTP sessions would be handled in
media-agnostic BGW mode")
The MS, or ES 283 031, is different: G.722 WB voice service is between
two G.725 terminals, but not between a terminal and a MS. In case of any
insertion of tones and announcements towards G.722 terminals, then the
(G.725) terminal would use the the NB fallback mode (= G.711). And G.711
is mandatory for ES 283 031. Just use G.711 from MS perspective ...
... and have a look in G.725.
-Albrecht
________________________________
From: avt-bounces@ietf.org [mailto:avt-bounces@ietf.org] On Behalf Of
Jose Yukio Akazawa
Sent: Samstag, 16. Februar 2008 18:45
To: avt@ietf.org
Subject: [AVT] MS x CLEARMODE
Hi,
ISDN 7Khz audio service requires 64Kbps so that CLEARMODE is the right
choice towards the MGW.
But, considering that CLEARMODE is not mandatory for MS (media servers)
according to TISPAN and most of the gateways nowadays
do not support G.722, so my question is how can we use the resources
(tones, announcements, conference) in the MS for ISDN 7 Khz calls?
Thanks,
Yukio
_______________________________________________ Audio/Video Transport Working Group avt@ietf.org http://www.ietf.org/mailman/listinfo/avt
- [AVT] MS x CLEARMODE Jose Yukio Akazawa
- Re: [AVT] MS x CLEARMODE Schwarz Albrecht