[asterisk-users] SIP Calls on Asterisk fails after 25000 calls

[A A ANEES-RJD876]

Hi,
 
I am trying to use asterisk open source version(asterisk-1.6.0.5) with
MySQL (using res_odbc)support for extensions and users list.
 
The call rate is 7 calls / second and each call stays for 120 seconds.
after making 25000 successful calls , calls started 
failing with following message on CLI.
 
[Nov 11 08:50:04] WARNING[2258]: app_dial.c:1502 dial_exec_full: Unable
to create channel of type 'SIP' (cause 20 - Unknown)
[Nov 11 08:50:04] WARNING[2259]: app_dial.c:1502 dial_exec_full: Unable
to create channel of type 'SIP' (cause 20 - Unknown)
 
 
Is there any configuration parameters I missed out ?  please provide
your valuable suggestions on the same.
 
Regards
Anees

 
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