We encountered an issue with our Cisco 2621 GW in call set-up with some SIP phones and SIP servers. The Cisco sends problematic re-invite messages which doesn't get any positive response to it because the Cisco does not increase the CSeq header value in the re-INVITE messages !
does anyone know how to resolve the issue of in Cisco? Maybe we should use a different version of IOS.
Here is the âsh verâ output of our GW:
Cisco IOS Software, C2600 Software (C2600-SPSERVICESK9-M), Version 12.3(14)T7, RELEASE SOFTWARE (fc2)
ROM: System Bootstrap, Version 12.2(8r) [cmong 8r], RELEASE SOFTWARE (fc1)
System image file is "flash:c2600-spservicesk9-mz.123-14.T7.bin"
Cisco 2621XM (MPC860P) processor (revision 0x401) with 125770K/5302K bytes of memory.
Processor board ID FCZ093670YT (3282082554)
M860 processor: part number 5, mask 2
2 FastEthernet interfaces
31 Serial interfaces
1 Channelized E1/PRI port
32K bytes of NVRAM.
49152K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102