asterisk users - Jan 2007 - Connecting 2 asterisk servers

hi all,
actually i have partially connected the 2 servers but there is a problem.

2 servers A and B
server A forwards call to server B without any problem
but when i try to forward call from server B to A, server shows the
following error on the cli

WARNING[7751]: app_dial.c:1081 dial_exec_full: Unable to create channel of
type 'SIP' (cause 3 - No route to destination)
  == Everyone is busy/congested at this time (1:0/0/1)

here is my configuration

SERVER A sip.conf
~~~~~~~~~~

[general]
register=>fromtrixbox:mysecret@192.168.0.7


[receive]             ;this should receive call from server B
type=friend
;host=192.168.0.7
host = dynamic
secret=mysecret
context=rizwan
;trunk=yes
insecure = very

[backtorazi]        ;this is used to throw call to server B (works fine)
type=friend
host=dynamic
secret=mysecret
context=rizwan

SERVER A extensions
~~~~~~~~~~~~~~~~~~~
[rizwan]
exten=> 5123,1,Dial(SIP/backtorazi/1234)  ;this dials to server B
exten=> 5123,2,Hangup

exten=> 1234,1,NoOp("Got connected successfully!"); ;this receives
from
server B

SERVER B sip.conf
~~~~~~~~~~~~~~~~~
[general]
register=>backtorazi:mysecret@192.168.0.100

[sender]         ;used tro call server A (not working)
type=friend
;host=192.168.0.100
host=dynamic
secret=mysecret
context=rizwan

[fromtrixbox]         ;used to receive call from server A (working fine)
type=friend
host=192.168.0.100
secret=mysecret
context=rizwan
;trunk=yes
insecure = very

SERVER B extensions
~~~~~~~~~~~~~~~~~~~
[rizwan]
exten => 5123,1,Dial(SIP/sender/5123) ;this dials server A

exten=> 1234,1,Dial(SIP/1234) ;this receives from server A



-- 
Regards
Rizwan Hisham
Software Engineer
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Hi,
im trying to connect 2 asterisk servers. my server which registers to the
main server keeps on displaying this message:

[Feb  3 20:04:57] NOTICE[10112]: chan_sip.c:7085 sip_reg_timeout:    --
Registration for 'rizwan@64.182.161.3' timed out, trying again (Attempt
#84)
why is it not registering?

here is my configuration:

Server A (this registers in the main server Server B)
Sip...
[general]
register=> rizwan:1234@64.182.161.3:8060 ;asterisk server listening to this
port

[RNKTEL-OUT] ;this is used to throw calls to SERVER B. This is not working
also
;allow=ulaw
authname=RNKTEL-OUT
canreinvite=no
context=rizwan
defaultip=64.182.161.3
;disallow=all
dtmfmode=rfc2833
fromdomain= 64.182.161.3
fromuser=asterisk
host=64.182.161.3
insecure=invite,port
nat=yes
secret=sipserver
type=friend
username=asterisk

SERVER B

sip.....

[rizwan]
userid=rizwan
secret=1234
type=friend
host=dynamic
context=rizwan
insecure=very
disallow=all
allow=alaw
allow=ulaw




-- 
Regards
Rizwan Hisham
Software Engineer
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