Instruction manual
Other products and services
9-4 Issue 9 May 2003
Multipoint Conferencing Unit
(MCU)/Conference Reservation and
Control System (CRCS)
The MCU has a DEFINITY ECS/MultiVantage™/Communication Manager-based 
architecture. The primary component of the MCU is the Multimedia Server Module 
(MSM), which is similar to the most basic version of the DEFINITY ECS Processor 
Port Network (PPN). MSM security concerns are similar to those for the 
Communication Manager, MultiVantage™ Software, and DEFINITY ECS 
(including, for example, trunking, COR, and COS). Therefore, refer to the 
appropriate sections in this document regarding Communication Manager, 
MultiVantage™ Software, and DEFINITY ECS for more information on MSM 
security.
The MCU system includes two possible adjuncts: the Expansion Services Module 
(ESM) and the Conference Reservation and Control System (CRCS). 
The ESM is a data conferencing module that communicates with the MSM. The 
ESM does not provide network access and is therefore not a source of toll fraud; 
however, the ESM requires proper password management on the part of system 
administrators and users to preserve the functionality of the ESM.
CRCS is the automated conference reservation and control system for the MCU 
product. CRCS is in part an extension of the DEFINITY SAT; therefore, once 
CRCS is installed, CRCS server and client logins should be set with passwords 
immediately. Also, ensure that CRCS is installed in a secure area or room that can 
be locked.










