Chapter 2 Introducing the BCM50 hardware 45Installation and Maintenance GuideTrunk media bay modulesTrunk media bay modules connect telecommunications lines to the BCM50 system.The table Trunk MBMs on page 45 lists the types of trunk media bay modules that are availablefor the BCM50 system.Digital trunk media bay moduleThe digital trunk media bay module (DTM) connects to a standard digital PSTN T1 or E1 carrier:• On North American BCM50 systems, the DTM connects a T1 (24 channel) or PRI (23channel) circuit to the BCM50. This PRI interface supports the NI-2 and MCDN protocolvariants.• On International BCM50 systems, the DTM connects a 30 channel PRI, DASS2, or DPNSScircuit to the BCM50. This PRI interface supports the ETSI Euro, ETSI QSIG, and MCDNprotocol variants.The front bezel of the DTM has an RJ-48C connector that connects the DTM to the serviceprovider connection point. The faceplate also has a set of monitor jacks you can use to monitor thespan.Six additional LEDs are on the front of the DTM. For information about these additional LEDs,see DTM LEDs on page 67.The figure DTM faceplate on page 46 shows the DTM module interfaces.Table 3 Trunk MBMsModule type Function Special notesDTM(see Digital trunk media baymodule on page 45)Connects digital public switchedtelephone lines to the BCM50 3.0system.Can connect to T1 or PRI-E1/T1interfaces.BRIM(see Basic rate interface mediabay module on page 46)Connects a maximum of four ISDN BRIS/T interfaces.—GATM4/GATM8(see Global Analog Trunk Moduleon page 46)Connects either four (GATM4) or eight(GATM8) analog public switchedtelephone lines to the BCM50 3.0system.—ADID4/ADID8(see Analog direct inward dialingmedia bay module on page 47)Connects either four (ADID4) or eight(ADID8) analog DID interfaces.—R2MFC Provides MFC-R2 connectivity over anE1 trunk.For details about the R2MFC MBM,see the R2MFC Media Bay ModuleInstallation and Configuration Guide(NN40010-300).Note: See Market profile attributes on page 285 for supported regions.
