OfficeServ 7400 General Description© Samsung Business Communications 2-9Optional ModulesThe optional modules available to mount on the LP40 module are the MFM, MIS, RCM2,SCM and CRM modules.y Multi-Frequency Module (MFM): MFM contains ASIC chips for detecting DTMF sig-nals. It can detect DTFM signals from 12 channels simultaneously. MFM is installed inLOC1 or LOC2 of the LP40 (the location is indicated on the LP40 module).y Miscellaneous (MIS): MIS provides the external hold sound source input ports, externalpaging ports, loud bell ports and common bell ports. Two dry ports connect or block thepower supply and signal transfers with external devices. MIS is installed in LOC3 of theLP40 module (the location is indicated on the LP40 module).y R2 CID Module 2 (RCM2): RCM2 detects and generates Caller Identification (CID)from 14 channels. It selects an operation mode (detection and generated signal) as R2 orCID using a switch in the module. It is installed in LOC1 or LOC2 of the LP40 module(the location is indicated on the LP40 module).Note: The R2 function is not currently available but is planned for a future release.y Switch Conference Module (SCM): SCM performs the Conference function. Up to 12groups can hold conferences (max. five persons per group). SCM detects DTFM signalstransmitted from 12 channels. It is installed in LOC1 or LOC2 of the LP40 module (thelocation is indicated on the LP40 module)y Common Resource Module (CRM): CRM detects and generates DTMF signals and CIDsignals. It is installed in LOC1 or LOC2 of the LP 40 module (the location is indicatedon the LP40 module).