Nortel BCM 3.5 Handbook - Digitcom

Digital Drop and Insert Mux (DDIM) Module
The Digital Drop and Insert Mux (DDIM) Module is a module that fits into the BCM and
combines the functionality of the standard BCM Digital Trunk Module with a built- in Drop and
Insert CSU. It accepts a T-1 with both voice and data from a service provider and splits off the
channels carrying data and routes them to an interface on the front of the module.
Figure 2-10
The front faceplate of the DDIM module has LEDs that indicate power, status and ongoing test
and alarms similar to the Digital Trunk Module. It also has LEDs that indicate the status of the
serial data interface, including Transmit, Receive, RTS, CTS, DCD, DSR and TM.
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