EXM-31 Hardware Reference
Page 44
4
4
1
RDL
on
Bit 4
RDL requested (AT&T6)
0
RDL not active *
1
RDL request from distant end is in service
Bit 5
RDL w/ self-test
0
RDL w/ self-test disabled *
1
RDL w/ self-test enabled (&T7)
Bit 6
Local analog loopback (ALB) w/ self-test
0
ALB w/ self-test disabled *
1
ALD w/ self-test enabled (&T8)
Bit
7
Reserved
S 18 Modem Test Timer
Sets 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 test
will not automatically terminate; the test must be terminated from the command
mode by issuing an &T0 or H command.
Range: 0 - 255 seconds
Default: 000
S19
Autosync Protocol Support Mode
Bit 1
0
Bisync protocol *
1
SDLC
protocol
Bit 2
0
SDLC address detect disabled *
1
SDLC address detect enabled
Bit 3
0
NRZI bit encoding *
1
NRZ
bit
encoding
Bit 4
0
Selects mark idle *
1
Selects flag or sync idle
S20
Autosync Protocol Support Mode
In SDLC mode: SDLC address
In Bisync mode: definition of Bisync sync character
S21 Bit-Mapped
Options
Содержание EXM-31
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