44
C
HAPTER
5: U
SING
THE
M
ODEM
S42
Bit-mapped. Nonstorable.
Bit 0. Length field in L-SIGNAL (UI) frames (V.25ter only)
■
0 do not indicate break signal length in UI frame.
■
1 indicate break length in L_SIGNAL (UI) frames
Bit 1. Break handling option 2 (V.25ter only)
■
0 ignore breaks from DTE
■
1 process break (bits 4-5 of S39)
Bits 3-2. TD buffer option when DTE ask for disconnection in V42 mode (V25ter only)
■
00 Discard all buffered data immediately
■
01 Attempt until all data is delivered
■
10 Attempt until all data is delivered or timer expires (timer is set by S38)
Bits 5-4. RD buffer option when remote DCE disconnect in V42 mode (V.25ter only)
■
00 Discard all buffered data immediately
■
10 Attempt until all data is delivered or timer expires (timer is set by S38)
■
01 Attempt until all data is delivered
Bits 7-6. V42bis compression option (V.25ter only)
■
00 No compression
■
10 Decompression only
■
01 Compression only
■
11 Both direction
S43
Break length transmitted to DTE when not specified in UI frame (in 10 ms) (V.25ter
only). Default = 30. Nonstorable.
S44
Error Correction in Use. Nonstorable.
■
0 = No error correction
■
5 = MNP class 5
■
2 = MNP class 2
■
6 = V.42
■
3 = MNP class 3
■
7 = V.42 bis
■
4 = MNP class 4
■
8 = V.42bis over an MNP link
S45
Reserved for internal use. Nonstorable.
S46
Fallback Character For Error Correction Negotiation. Value: 0 - 127. Default 13 (ASCII
CR). Storable.
S47
XON Character. Value: 0 - 127. Default = 17. Storable.
S48
XOFF Character. Value: 0 - 127. Default = 19. Storable.
