44CHAPTER 5: USING THE MODEM

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.

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3Com PC Card manual Discard all buffered data immediately