Multitech MMH900 User Manual page 144

so the mux sends a start data Flow Control (ON) signal to the mini.
D. Data from the mini again flows through the channel.
Printer pacing and Flow Control
The example below shows how Pacing and Flow Control work on a
printer.
(Host)
Channel
MUX
Mini-
Computer 1
Print Data
A.
B.
C.
Flow Control
D.
off
E.
F.
Flow Control
G.
on
Print Data
H.
A. Print data volume from the mini is appropriate for the printer to
process and print it.
B. The printer cannot handle any more data due to its buffers being full
and it issues a Pace OFF signal to the mux.
C. The remote mux sends a Flow Control OFF signal to the other mux
and uses its buffer to store any pending print data.
D. The host mux sends a Flow Control OFF signal to the mini and uses
its buffer to store any pending print data.
E,F,G. The printer buffer empties and is ready for more print data, so it
issues a Pace ON signal which, in turn, causes a Flow Control ON
signal through to themini.
H. Print data from the mini resumes.
Appendix D - Command Modem Commands
Channel
Link
MUX
Pace
off
Flow Control
off
Pace
on
Flow Control
on
(Remote)
1
Printer
Printer Prints
Data
Print Buffer
Full
Printer
Ready
Printer Prints
Data
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