I´ve a CCM cluster 188.8.131.520-12, and I´m tryng to enable a trunk SIP against a Asterisk SIP Server which provides an access to cell phone calls. But the CCM is not able to reach the Asterisk. I can ping the server ok, but if a IP phone tries to call using the trunk SIP I receive congestion tone,but on Asterisk no sip invite (or any sip activity is received).
But the Asterisk can call IP phones registered on CCM, so the issue is not on the LAN. Also I´ve tested using a gateway on the same lan as CCM cluster, and with a csim start on gateway I can call cell phones using the Asterisk.
Also I have tested using a free sip softphone on the same LAN as IP phones, and with the softphone I can also call using the asterisk.
According to all this, the issue is on the CCM cluster, maybe there is something missing on the config, or maybe there is a bug for this version of CCM.
Any idea will be great. Please let me know.