84 Chapter 1 Introduction to the Business Communications Manager Platform Hardware
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Figure 48 Digital Drop & Insert (DDIM) faceplate
Power LED
Status LED
In Service LED
Loopback Test LED
Continuity Loopback
Receive LEDs
Transmit LEDs
Loopback
RJ48C digital telephone line connector
TxD RxD RTS CTS DCD DSR TM