asterisk users - Apr 2005 - Grandstream Won't hangup like Polycom 600 will

I have been experimenting with GXP-2000 Grandstream.

When I do this:

Grandstream > Asterisk > Polycom600
  then  Hangup the Grandstream, the Polycom hangs up and is ready for the
next call

Polycom>Asterisk>Grandstream
  then Hangup the Polycom, the Grandstream plays a busy signal.

I believe the firmware for the GXP-2000 is substantially the same as the
BugetTone.

Why is this important to me?

I have turned on "Auto Answer" on GXP-2000.  When someone wants to
announce
a call, they dial the extension, talk, then hang up.  This is great if
someone is at the extension.  But if no one is there, the phone's
speakerphone will ring busy annoying everyone nearby.

Thanks,

George Burt

On Wed, Apr 13, 2005 at 03:08:43PM -0400, George Burt
wrote:
> I have been experimenting with GXP-2000 Grandstream.
	[snip]
> Polycom>Asterisk>Grandstream
>   then Hangup the Polycom, the Grandstream plays a busy signal.
This is my experience as well.  The GXP2000 always seems to play a busy
signal when the other end hangs up.  It does not seem to matter which
end placed the call, or whether the call is SIP-SIP or SIP-*-PSTN.

This is not what any other phone does in my experience, so I think I'm
reasonable in considering it a bug.

I am overall unimpressed with the GXP2000 -- although the cost savings
is significant, the lack of features by comparison with other
"enterprise" marketed SIP phones (e.g. the SNOM or Cisco offerings) is
also quite substantial ... and I do not think I will ever get used to
the idiosyncratic Grandstream way of entering alphanumeric addresses.

-- 
Karl A. Krueger <kkrueger@whoi.edu>
Network Security -- Linux/Unix Systems Support -- Etc.
Woods Hole Oceanographic Institution