25
W&T
RS232 Serial Buffer
Subject to error and alteration
Start of data transmission
The command 1Bh 02h 0Dh outputs all the incoming data. Data
flow control is handled according to the handshake procedure
set on Switches S2.1 and S3.1.
Stopping data transmission
The command 1Bh 03h 0Dh disables the output port. All in-
coming data are stored. After turning on the buffer or after a
reset, the interface to the PC is always disabled.
Outputting memory resources
When the output is disabled, command 1Bh 07h 0Dh can be
used to get the memory space in % of the total capacity which
is being used to store call data. The buffer replies with a 2-byte
ASCII string plus a carriage return.
Identification
In addition to the above commands, the TC Buffer model 88410
is able of providing a serial number. The buffer replies to the
command 1Bh 15h 0Dh with its serial number in the form of a
10-byte long ASCII string plus carriage return (0Dh).
Additional modem functions for Model #88410
Setting switch S1.1 to the ON position the TC Buffer Model
88410 allows the device to work in Hayes modem mode. If more
than 80% of the memory capacity is used, the buffer itself uses
AT sequences to try and establish a connection with a com-
puter, which reads out the stored data.
Summary of Contents for RS232 88102
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