EXM-31 Hardware ReferencePage 444 41 RDL onBit 4 RDL requested (AT&T6)0 RDL not active *1 RDL request from distant end is in serviceBit 5 RDL w/ self-test0 RDL w/ self-test disabled *1 RDL w/ self-test enabled (&T7)Bit 6 Local analog loopback (ALB) w/ self-test0 ALB w/ self-test disabled *1 ALD w/ self-test enabled (&T8)Bit 7 ReservedS 18 Modem Test TimerSets the length of time, in seconds, that the modem conducts a test (commanded by&Tn) before returning to the command mode. If this register value is zero, the testwill not automatically terminate; the test must be terminated from the commandmode by issuing an &T0 or H command.Range: 0 - 255 secondsDefault: 000S19 Autosync Protocol Support ModeBit 1 0 Bisync protocol *1 SDLC protocolBit 2 0 SDLC address detect disabled *1 SDLC address detect enabledBit 3 0 NRZI bit encoding *1 NRZ bit encodingBit 4 0 Selects mark idle *1 Selects flag or sync idleS20 Autosync Protocol Support ModeIn SDLC mode: SDLC addressIn Bisync mode: definition of Bisync sync characterS21 Bit-Mapped Options
