Hi Everyone,
Please help me to solve the problem with the specific CUCM Device Pool unable to make calls to the NEC PBX. I have checked the firewall and network, but everything is clean. If I make a call with another device pool, it works fine. I have also asked this to the TAC engineer, but TAC still advised me to check the firewall or network. And the results are still the same, on the firewall I have applied for an IP permit, there is no SIP Inspection and the network is symmetrical.
Thank you in advance.
