Jerry Jones 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?
The rest of the Internet traffic is _not_ interrupted, and his voice
continues to be heard, so even that part of the connection continues
uninterrupted.
I'm not sure how to diagnose whether the modem is bad or not, given that
other traffic (and half of this traffic) continues to flow over it. I
can only imagine calling Bellsouth and being told "we don't support VoIP
unless you buy our VoIP service...".
Thanks Jerry!
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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