asterisk users - May 2013 - Connecting Multiple Asterisk instances getting "Unable to create channel of type 'SIP'"

Hi,

I'm trying to connect two asterisk instances using the method described
here..

http://ofps.oreilly.com/titles/9781449332426/asterisk-OutsideConn.html

under the section

"Connecting two Asterisk systems together with SIP"

I have an user named venu in serverA and vijay in serverB

the serverA ip is 192.168.0.35 & serverB is 192.168.0.36

Here are the details of the config files (extension & sip):
http://paste.kde.org/737888

When i make a call to extension 998 in using user as venu, here is the
output i get..

http://paste.kde.org/737894

The problem is that, I'm getting the
*Unable to create channel of type 'SIP' (cause 20 - Subscriber absent)*

but I want to make a call to vijay.. can anyone please let me know where I
am going wrong?


I have the same error when I try to make a call from sip client to a analog
phone in a single server asterisk setup... :-\

I'm running Asterisk 11.3 on Ubuntu 12.04 on a KVM virtualized instance..
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> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com 
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
> Sandeep Raju
> Sent: Sunday, 5 May 2013 8:34 p.m.
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: [asterisk-users] Connecting Multiple Asterisk 
> instances getting "Unable to create channel of type
'SIP'"
> 
<snip>
> 
> When i make a call to extension 998 in using user as venu, 
> here is the output i get..
> 
> http://paste.kde.org/737894
> 
> The problem is that, I'm getting the
> Unable to create channel of type 'SIP' (cause 20 - Subscriber
absent)
> 
> 
> but I want to make a call to vijay.. can anyone please let me 
> know where I am going wrong?
> 
The clue is 
21.    -- Executing [999 at incoming:2] Dial("SIP/serverA-00000004",
"SIP/vijay at serverB") in new stack
24. getaddrinfo("serverB", "(null)", ...): Name or service
not known
25. No such host: serverB

I believe extension 999 in server B is wrong.
It should be;

# extensions.conf in serverB
[incoming]
exten => 999,1,Answer()
exten => 999,n,Dial(SIP/vijay)
exten => 999,n,HangUp()

Alec