ashtech GG Surveyor, Reference Manual

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E-4 GG Surveyor GPS+GLONASS Reference Manual
Supported Protocols
Table E.2 lists the protocols supported by the Customer Support BBS.
The preferred protocols are ZMODEM, SEAlink, YMODEM.
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Table E.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.