[Asterisk-Users] PSTN Incoming call on real line disrupts VoIPcall over DSL circuit

[Alex Robar]

Rick,

I'm not sure what fix was actually performed to the line. I just explained
to Bell that there was a large interruption in data service when a voice
call first rang through, and they sent a tech right out.

Alex

On 5/8/06, Rick Smith <rick at rtps.net> wrote:
>
> what'd that fix have to do with ?
>
> Is it a frequency interference thing ?
>
>
>  ------------------------------
> *From:* asterisk-users-bounces at lists.digium.com [mailto:
> asterisk-users-bounces at lists.digium.com] *On Behalf Of *Alex Robar
> *Sent:* Monday, May 08, 2006 4:08 PM
> *To:* Asterisk Users Mailing List - Non-Commercial Discussion
> *Subject:* Re: [Asterisk-Users] PSTN Incoming call on real line disrupts
> VoIPcall over DSL circuit
>
> I'll lean this way too. I had a DSL line from Bell Canada in Kingston,
> Ontario, and an incoming call on that line to the POTS phones would cause
> VoIP traffic to become completely unintelligble. The VoIP call would have to
> be re-established to fix things. A quick call to Bell had a technican out to
> check the lines, and put a fix in place for me.
>
> Alex Robar
>
> On 5/8/06, Jerry Jones <jjones at danrj.com> wrote:
> >
> > I would guess either the DSL itself is bad or perhaps the dsl Modem.
> > perhaps calling Bellsouth would be helpful? Does other Internet
> > traffic get interrupted also?
> >
> >
> > On May 8, 2006, at 1:42 PM, Hadar Pedhazur wrote:
> >
> > > I haven't seen anything this strange, and it's 100% reproducible.
> > > I'm hoping that there are some clever ideas out there for what to
> > > look for, since I can test to my heart's desire on this one...
> > >
> > > My Dad lives in Florida, and has a Bellsouth DSL line. Of course,
> > > he has a regular POTS line connected on the same line. He has the
> > > appropriate filters on every jack that has a phone connected to it,
> > > and he even replaced one or two of them (when I thought that was
> > > the problem).
> > >
> > > I sent him a HandyTone GS-486 (HT), configured to connect back to
> > > my Asterisk server. He only has a single computer in his apartment,
> > > so it's connected into the HT, and the HT is connected into the DSL
> > > modem.
> > >
> > > He can make and receive calls on the HT, and the quality is
> > > excellent. If he's speaking via the HT (meaning a VoIP-only call)
> > > and the "real" phone rings, everything continues fine
> > > (temporarily). If the real phone is answered, either by a person,
> > > or by the answering machine (which is in another room, connected to
> > > a filter on another jack), then the audio on the Asterisk
> > > conversation becomes _one way_. My father can be heard _perfectly_
> > > by the remote side of the conversation, but he can hear nothing.
> > > When the POTS line is hung up, then both sides of the VoIP call go
> > > dead (audio-wise). Of course, he can now redial a VoIP call, and
> > > both sides work perfectly...
> > >
> > > At first, I couldn't imagine that it was anything other than a bad
> > > filter, but other than replacing the filter (which didn't help),
> > > nothing else stops working. He can continue to use the Internet
> > > connection on his PC just fine, and I can continue to hear him
> > > speak over the VoIP connection with no problems either, so the
> > > Internet connection has not been lost.
> > >
> > > I have to admit to being completely clueless as to what to even
> > > look for, so _any_ advice as to things to test for would be
> > > appreciated. As I said at the top, I can reproduce this 100% of the
> > > time, so I can easily setup any debugging environment in advance,
> > > and trigger the problem at will, etc.
> > >
> > > Thanks in advance!
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>
>
> --
> Alex Robar
> alex.robar at gmail.com
>
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--
Alex Robar
alex.robar at gmail.com
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