According to this (http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/compat/ccmcompmatr1.pdf ) the ATA 186 are only supported up to CUCM 8.0. Is this simply outdated information, or is ATA 186 really no longer supported in anything newer?
ATA is end of sale and it replaced with ATA 187
But is still supported on v9 according to the below link
please rate if this will help