[asterisk-users] Interesting observation

[Frank Bulk]

Tim:

Are you referring to the older-style cable telephony where they had an
analog carrier on the cable plant, or PacketCable VoIP?

Frank

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Tim Nelson
Sent: Monday, January 19, 2009 12:51 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] Interesting observation

My understanding is that Charter 'telephone' doesn't use IP at all but
rather uses some additional frequency spectrum on their cable network.
Hence, the reason why faxing with their service is reliable unlike other
providers who are *actually* using VoIP.

It sounds like they're suffering from clipping of some sort or almost a
half-duplex audio situation. Weird. I've seen some el-cheapo cordless phones
behave this way but never a 'business' solution. Eek.

Tim Nelson
Systems/Network Support
Rockbochs Inc.
(218)727-4332 x105

----- "Darrick Hartman" <dhartman at djhsolutions.com> wrote:

> I have an interesting observation which I thought I'd pass along to
> save
> other people from spending time trying to 'fix' it.
>
> One of my clients uses Charter's so called "business phone service".
> They provide 'analog' phone lines over IP.  In general, they've worked
>
> OK.  End users were saying that the phone are "cutting out" at times.
>
> What I've observed is they actually do "cut out" (meaning all inbound
>
> audio is momentarily lost) if a loud noise is created on the local
> end.
>   This client has a machine shop so you can imagine that at times it
> does get quite loud.
>
> I spent a few hours trying to different setting in the Polycom phones,
>
> but finally thought I'd try plugging an analog headset into the
> Charter
> CPE device directly.  The same behavior was experienced.  It appears
> they have a 'feature' which cuts out the incoming audio if a loud
> noise
> (simulated by blowing into the receiver) is experienced outgoing.
>
> Pretty much going to a true analog service is the only solution that I
>
> can think of.  Would be interested if anyone has other thoughts.
>
> Darrick
>
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