54 Chapter 2 Introducing the BCM hardwareN0060612N0060612Digital trunk media bay moduleThe digital trunk media bay module (DTM) connects to a standard digital PSTN T1/fT1, E1/fE1,or PRI ISDN line using either a digital or PRI line. The DTM also supports DASS2, DPN22,Q.SIG, and MCDN over ISDN:• On North American BCM systems, the DTM connects a T1 or PRI circuit to the BCM system;T1 circuits provide 24 digital channels to the PSTN, while PRI circuits provide 23 digitalchannels to the PSTN.• On International BCM systems, the DTM connects an ETSI ISDN (E1) or PRI (EI) circuit tothe BCM system, providing a maximum of 30 digital channels to the PSTN.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.There are six additional LEDs on the front of the DTM. For information about these additionalLEDs, refer to “DTM LEDs” on page 80.Figure 27 shows the DTM module interfaces.ISDN BRI(see “Basic rate interface mediabay module” on page 56)Connects a maximum of four ISDN BRIS/T interfaces.GATM4/GATM8(see “Global analog trunk mediabay module” on page 56)Connects either four (GATM4) or eight(GATM8) analog public switchedtelephone lines to the BCM system.ADID4/ADID8(see Analog direct inward dialingmedia bay module on page 57)Connects either four (ADID4) or eight(ADID8) analog DID interfaces.Note: Refer to “Market profile attributes” on page 355 for supported market profiles.Warning: Install DTMs in the BCM main unit only. DTMs do not function ifinstalled in the BCM expansion unit.If there are no empty MBM bays in the BCM main unit, move MBMs to theexpansion unit to provide space for the DTMs.Table 8 Trunk MBMs (Sheet 2 of 2)MBM What it does Special notes
