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Command Protocol
Host controller commands supported by the unit are defined below. All commands should be terminated with a <CR> (carriage
return). When a command is sent, the entire string is echoed back to the host along with a response from the addressed unit as
shown in the command definitions. All characters should be upper case, and all numbers below 10 should have a leading 0 (ex: 1
= 01).
NOTE: For units with one output or user port, use 01 for the output select.
RS-232 Command Protocol Quick Reference
Legend:
(All numbers must be two digits)
SW : Switch (01-15)
BR : Baud Rate Code (12,24,48,96)
VV : Volume Level (00-99, XX=UNSUPPORTED)
MU : Mute State (00=UNMUTE, 01=MUTE, XX=UNSUPPORTED)
OP : Output Port (01-MAXOUTPUTS)
IP : Input Port (01-MAXINPUTS)
MM : Save Into Memory Bank (00-09)
LL : Load From Memory Bank (00-09)
<CR> : Carriage Return (Hex 0xD)
Command String Good Response Description
CS SW,IP,OP *<CR> VIDEO Connect One Output/User Port To Input/CPU Port
CA SW,IP *<CR> VIDEO Connect All Output/User Ports To Input/CPU Port
RO SW,OP *<CR>IP<CR> VIDEO Read Connection For Output/User Port
AS SW,IP,OP *<CR> AUDIO Connect One Output/User Port To Input/CPU Port
AA SW,IP *<CR> AUDIO Connect All Output/User Ports To Input/CPU Port
AO SW,OP *<CR>IP<CR> AUDIO Read Connection For Output/User Port
AM SW,OP,MU *<CR> Set Mute State For Output/User Port
AV SW,OP,VV *<CR> Set Volume Level For Output/User Port
CC SW,MM *<CR>MM<CR> Save Matrix Connections Into Memory Bank
RC SW,LL *<CR>LL<CR> Restore Matrix Connections From Memory Bank
CB 00,BR None Change Baud Rate For All Switches
RS SW *<CR> Internal Reset
RV SW,00 *<CR>string\0<CR> Read NTI Version String
RU SW *<CR>IP,OP<CR> Read Unit Size
AR SW,OP *<CR>MU,VV<CR> Read Mute, Volume For Output/User Port
RS-232 Command Protocol Full Specification
CC - Save Matrix Connections Into Memory Bank
Format:
CC SW,MM<CR>
Successful Response:
*<CR>
MM<CR>
Syntax or Transmission Error:
?<CR>
Behavior:
Will save all VIDEO in/out and AUDIO in/out connections into the specified memory bank. Responds with an * for success,
followed by the memory bank it was saved to.
RC - Restore Matrix Connections From Memory Bank
Format:
RC SW,LL<CR>
Successful Response:
*<CR>
LL<CR>
Syntax or Transmission Error:
?<CR>
Behavior:
Will restore all VIDEO in/out and AUDIO in/out connections to the state saved in the specified memory bank. Responds with
an * for success, followed by the memory location it was restored from.