AT&T System 85 manual Modular Trunk Data Module Mtdm

Trunk Data Module (TDM)

MODULAR TRUNK DATA MODULE (MTDM)

POWER

DATA SET

READY

TEST IN PROGRESS

LINE STATUS

ORIG/ MTDM

DISC

CHECK

OPTIONS

RECEIVE DATA

CALL IN

PROGRESS

SEND DATA

CARRIER ON

FIGURE 5-6. The MTDM, the Stand-alone model

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