User manual

58
© 1999 SGC Inc
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
P.O.Box 3526, 98009 Fax: [phone] or 746-7173 Tel: [phone] or 1-800-259 7331
E-mail: [e-mail] Web site: http://www.sgcworld.com
CMD Host Value Description
Command OpCode Range
SID MG selcal sets the TNC's identification. The ID may be 4
This letters, 4 or 5 digits that would make the unit
command respond in CCIR476 mode. If the ID is 9 digits
may be sent it will respond in CCIR625 mode.
twice, once SID may be set twice, once with a CCIR476
for the 4/5 and then with a CCIR625 identification. The
character TNC will then respond to either call. An
selcal optional "/" may follow the ID with two letters
and the followed by an optional two digits. When the
second time "/" and digits are present a channel-free signal
for the 9 will be sent formed by these letters. If the let
character ters are followed by the digits, these digits form
selcal the time interval (digits x 450ms) that the
modem will remain in standby before returning
to "dead". If no digits are given, this delay is 15
sec. If no "/" and letters given the TNC never
times out of standby. If the CW id is set (SCW)
and free channel transmission is enabled, a free
signal broadcast will consist of the CW-id fol
lowed by eight channel free blocks. CW-id is
omitted when CW-id is null. If a dual ID is set,
only the channel-free data from the last call
will be used.
Like for SELCAL, do not change ID on the fly.
SIG IG 1...15 sets the audio input gain in +1.5dB steps. 0 - 15
is valid.
SKE na enters keyboard mode. Returns to command
mode upon user entering the ESC key.
SLI S3 na Initiates ARQ listen mode. The user should
enter keyboard mode to print traffic. Returns to
"dead" when SOL or SOT issued.
SOG OG 1...15 set the audio output attenuation in -1.5 dB
steps. 0 - 15 is valid.
SOL RC na sets an end-of-link request. This is recognized
in ARQ send (SAR), FEC send (SFE), ARQ
listen (SLI), and Test mode (STS). In these
cases, the operation is terminated and the TNC
returns to "dead" mode awaiting new com
mands. Note: If ARQ is attempted and it has
not yet linked, this command will not affect the
termination of the present mode. Use SED in
this case.