[164873] in North American Network Operators' Group
RE: Comcast contact
daemon@ATHENA.MIT.EDU (Shaw, Matthew)
Wed Aug 7 09:55:06 2013
From: "Shaw, Matthew" <mshaw@fairpoint.com>
To: Rob Seastrom <rs@seastrom.com>
Date: Wed, 7 Aug 2013 13:54:32 +0000
In-Reply-To: <864nb2yx1h.fsf@valhalla.seastrom.com>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
I agree it's not a lot of bandwidth, but I was grasping at straws at that =
point finding out about the cross country VoIP arrangement after the fact.=
For whatever reason, the 711 calls were full of voice clipping and call d=
rops, 729, (with to your point, the lower MOS) worked better as despite no=
t sounding as good, the calls stopped dropping and people's voices were no=
longer dropping out.
Matt
-----Original Message-----
From: Rob Seastrom [mailto:rs@seastrom.com]=20
Sent: Tuesday, August 06, 2013 11:56 PM
To: Shaw, Matthew
Cc: Brandon Galbraith; Andy Ringsmuth; NANOG list
Subject: Re: Comcast contact
"Shaw, Matthew" <mshaw@fairpoint.com> writes:
> Make sure the remote phone is using a low bandwidth codec too. In a=20
> previous life changing a remote (home) user's phone from G.711 to
> G.729 made all the difference in the world to their call quality.
i think you've got that backwards. 80 kbit/sec on the wire is not a lot t=
hese days, and in a world where we're conditioned to accept gsm or worse, =
un-transcoded g.711u sounds startlingly good. if you're so short on bandw=
idth that moving to a 24 kbit/sec on the wire codec makes a difference, yo=
u're on the ragged edge of being hosed.
-r
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