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AT Command Set and S-Registers
13-213980-A2-GB30-40 October 1998
Table 13-2
(4 of 15)
3800
Plus
S-Registers
AT Command Front Panel BranchDescription
S28 SDC Negotiation
Controls negotiation between two modems attempting to connect using
SDC.
Register has the following values:
0 = LAPM_Buffer
1 = LAPM_Discon
The factory setting is LAPM_Buffer.
Configure\Edit\
V42/MNP/Buffer
S29 SDC Idle Fill
Determines whether the modem uses an HDLC flag or mark to fill the time
between DTE frame transfers.
Register has the following values:
0 = Flag_Fill
1 = Mark_Fill
The factory setting is Flag_Fill.
Configure\Edit\
V42/MNP/Buffer
S30 Sync DTE Rate
Identifies the synchronous DTE’s operating rate to the modem.
Register has the following values:
0 = 128,000 bps
1 = 115,200 bps
2 = 112,000 bps
3 = 96,000 bps
4 = 76,800 bps
5 = 72,000 bps
6 = 64,000 bps
7 = 57,600 bps
8 = 56,000 bps
9 = 48,000 bps
10 = 38,400 bps
11 = 28,800 bps
12 = 19,200 bps
13 = 14,400 bps
14 = 9600 bps
15 = 4800 bps
16 = 2400 bps
17 = 1200 bps
The factory setting is 128,000 bps.
Configure\Edit\ DTE
Interface
S31 SDC Bit Encoding
Determines the type of bit encoding used when transmitting synchronous
DTE data.
Register has the following values:
0 = NRZ
1 = NRZI
The factory setting is NRZ.
Configure\Edit\
V42/MNP/Buffer