Hello,

  I've got strange problems trying to run asterisk with MGCP ip phones
  (Thomson ST2030).

  Situation:

  "user A" <----- pstn -------> ASTERISK <----- mgcp ------> "user B"

  "User A", connected behind a PSTN, tries to call "User B". After dialing
  "User B"'s number, call comes to ASTERISK, ASTERISK contacts "User B".
  "User B" hears alerting/ringing tone, on display sees "User A"'s number.
  "User A" hears ringback.
  But, ASTERISK(?) at the same time transmits sound received from "User A" to
  "User B"'s phone, so "User B" hears "User A"!.

  Both of them are still hearing ringing/ringback tone. Call is not connected
  (from PSTN point of view). "User B" just additionaly hears sound from "User
  A" side.

  Do You have any idea, what's going on and if it's ASTERISK/Thomson ST2030/
  feature or bug?

  In mgcp.conf I have something like this:

[00147xxxxxxx]
context=from-internal
host=dynamic
callerid="XXX" <2992>
threewaycalling=yes
transfer=yes
callwaiting=yes
cancallforward=yes
line => aaln/1  

where 00147xxxxxxx is mac address of mgcp ip phone.

Thanks

Igor


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