Call transfer failed

Asterisk Asterisk Support
1

Hi,

I am trying to forward a call but can not succeed.
Steps:

  1. First I dial from 901 to 900 and the call connects.
  2. Then at the client extension 900 on which call is received in step 1 above, I dial 902# to connect the call from 901 to 902
  3. Then I hear the tone that "It is an invalid extension. Please try again."
    Please Let me know what is wrong here ?

Following is the configuration:
Topology:
Here, 3 clients with extensions 900,901,902 are connected to the asterisk server.


client1[900]<------------------>|
client2[901]<------------------>|<---->AsteriskServer
client3[902]<------------------>|

sip.conf
[900]
type=friend
disallow=all
allow=alaw
host=10.0.16.36
port=5060
dtmfmode=rfc2833
qualify=yes
canreinvite=yes
insecure=port
context=default

[901]
type=friend
disallow=all
allow=alaw
host=10.0.16.37
port=5060
dtmfmode=rfc2833
qualify=yes
canreinvite=yes
insecure=port
context=default

[902]
type=friend
disallow=all
allow=alaw
host=10.0.16.38
port=5060
dtmfmode=rfc2833
qualify=yes
canreinvite=yes
insecure=port
context=default

extensions.conf
[default]
exten => _90X,1,Dial(SIP/${EXTEN},tT)

features.conf
[general]
context => default
comebacktoorigin = yes
courtesytone = beep
parkedplay = both
parkedcalltransfers = both
transferdigittimeout => 1
xfersound = beep
xferfailsound = beeperr
pickupexten = *8
featuredigittimeout = 1000
atxfernoanswertimeout = 15
atxfer => *2

Please suggest the necessary changes for this configuration.

Regards,
Chetan Dua

2

902# will not match _90X. I suspect the problem is in the phones’ dialplans, not the Asterisk configuration.

(There is a fairly normal level of deprecated options and bad security practice in the Asterisk configuration.)

3

Then what statement should be mentioned in extensions.conf to match the call transfer keyword corresponding to 902# ?
OR
what number should be dialed at one of the clients to transfer the call to extension 902 for the above mentioned configuration ?

4

902#, or _90X#, or _90X.

Note you will need to substring the extension to remove the #.

5

I have tried that in the dialplan but it doesn’t work.

extensions.conf
exten => 900,1,Dial(SIP/${EXTEN},tT)
exten => 901,1,Dial(SIP/${EXTEN},tT)
exten => 902,1,Dial(SIP/${EXTEN},tT)

exten => 902#,1,Set(number=${EXTEN:0:-1})
exten => 902#,n,Dial(SIP/${number})

There is a weird thing that I observed in asterisk. The logs do not show the extension dialed for transfer. So I could not resolve the problem any further.

Thanks anyways :smile:

Regards,
Chetan Dua