I have problem with working of inbound calls from PSTN. When caller dial busy phone, his hear silence instead of busy tone.
I use following scheme:
PSTN>Cisco 2921>CUCM 7.1 + CCX 7.0.2
PSTN user call number 22xxxx, this number translte on Cisco 2921 to 2052 - CCX route point. When call place to 2052 CCX application (script) starts and PSTN user dial additional number 1065. If another PSTN user try to call number 1065 at the same time, his hear silence instead of busy signal.
I think problem with signaling, but I dont no how resolve it.