Thank you for the reply.
Please check below my iax2 settings
Server 1
CID Options: Allow any CID
Out going settings
Trunk Name: pbx1
PEER Details:
username=pbx1
type=peer
secret=pakistan
qualify=yes
host=192.168.89.103
disallow=all
context=from-trunk
allow=gsm
Incoming Settings
USER Context: pbx2
USER Details:
type=user
secret=pakistan
qualify=yes
host=192.168.89.103
disallow=all
context=from-trunk
allow=gsm
===========================
Server 2
CID Options: Allow any CID
Outgoing Settings
Trunk Name: pbx2
PEER Dstails:
username=pbx2
type=peer
secret=pakistan
qualify=yes
host=192.168.88.254
context=from-trunk
disallow=all
allow=gsm
Incoming Settings
USER Context: pbx1
USER Details:
type=user
secret=pakistan
host=192.168.88.254
context=from-internal
disallow=all
allow=gsm
=====================
I highly appreciate your help. Many thanks… please do reply.