CTI ports take only 1 ms to reinitialize (ie, to get back to operation after a call is disconnected), but CMT groups will take upto 200 ms to reinitialize. IPCCX will not answer calls if there are no CMT ports available. So make sure you provision 10% more CMT ports than CTI ports.
IPCCX – provisioning CTI port and Media termination groups
Posted: July 25, 2006 by cciestudy in IPCC ExpressComments
What exactly is CMT port in terms of CUCM?