[Asterisk-Dev] Asterisk voicemail and analog handset on the same line?

[Sam Bingner]

WaitForRing may be of help to you...  But why not just connect all your
office lines to a single output from the TDM400P?  Then you have all the
other features from * available

-----Original Message-----
From: asterisk-dev-admin at lists.digium.com
[mailto:asterisk-dev-admin at lists.digium.com] On Behalf Of Michael
Grabinski
Sent: Sunday, April 25, 2004 7:31 AM
To: asterisk-dev at lists.digium.com
Subject: [Asterisk-Dev] Asterisk voicemail and analog handset on the same
line?


Hey folks,

I attempted to set up a small asterisk-based phone system for our office
using a couple of X100P to analog lines, and a few Grandstream Budgetone
phones.

I encountered a number of problems.  A bad echo, dropped calls, DTMF
working sporadically.  Searching the list yielded a small improvement in
the echo, but I can't get things working well enough that my co-workers
aren't frustrated on a daily basis with the system.

Anyway, I am abandoning the Budgetone phones for incoming/outgoing calls,
but the asterisk voicemail works great so I want to keep it.

The crux of my problem is this:

I would like to run the asterisk box and two analog phones on the same
phone line.  Collisions only occur with incoming calls because the
asterisk box does not place outgoing calls.

If someone answers an incoming call on a line shared with the asterisk
box, it has no way of "knowing" the call was answered and plays the
auto-attendent greeting after 20 seconds.

Is there a way for asterisk to "know" that a call has been answered by a
phone on the same analog line as the asterisk box, if the answering phone
is not hooked up to the box via a TDM400P for example?  Can it listen for
rings and not answer if the rings are no longer present.

The only thing I was able to think of was having the users key in a
sequence to shut the auto-attendent off when they're in the office and
turn it back on when they leave, but that seems like an error-prone hack
to me.

I don't have any knowledge about the switching mechanics that asterisk
uses, so I would appreciate any help in salvaging what's left of the
system. Thanks.

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