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B-4 Z-Family Technical Reference Manual

Supported Protocols

B.2 lists the protocols supported by the Customer Support BBS.

The preferred protocols are ZMODEM, SEAlink, YMODEM.

Table B.2: Protocols

Protocol Description

XMODEM Widely supported, uses 128-byte blocks. Good for moderately

noisy lines. May cause file integrity problems by rounding.

XMODEM-1k Uses 1024-byte blocks. Supposedly better for 2400 baud+. May

cause file integrity problems by rounding.

YMODEM Also known as YMODEM Batch, passes filename and size,

eliminating rounding problems. Capable of multiple file transfer

(batch).

YMODEM-G Fast protocol for use only with error-free data links. Not

recommended.

SEAlink Passes filename and size, eliminating rounding problems.

Capable of file transfer (batch). Good for noisy line conditions

and links where delays occur (satellite-based long distance, or

packet-switched networks).

KERMIT Slow, but works with almost any transmission medium.

SuperKERMIT Same as KERMIT, but faster. Good for noisy line conditions and

where delays occur (satellite-based long distance, or packet-

switched networks).

ZMODEM Newer protocol that supports batch and exact file size. Good for

noisy conditions. Includes all ZMODEM-90Ô extensions.

ASCII Only for users with no other protocols available. No error

checking, not recommended.

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Ashtech Z-sensor Spécifications Page 254