Instruction manual
Theory of Operation: Tone Remote Control Board
30 6881086C22-B
Smart Modem Protocol 
(SMP) Control
The ASTRO Tone Remote Control Board also provides an RS232 port through 
which the Consolette communicates with an ASTRO Console Interface 
Module (ACIM) using the Smart Modem Protocol (SMP).
NOTE: For correct operation, the ACIM must be connected to a Gold 
Series Console programmed with System 3.0 Conventional 
or later.
Depending on the setting of S100-3, the operation of the Tone Remote Control 
board can vary as follows:
S100 Pin 3 ON—Tone Remote 
Control
In this setup, the Consolette can only be controlled remotely by a tone remote 
deskset, via the wireline, as described in “General Description” on page 23 
under “Tone Remote Control Board.” The Consolette will report both PTT-IDs 
and Call Alert IDs, when applicable, to Accessory Connector 1 (J13). See 
Table 13. For a list of supported IDs, see Table 14 on page 31.
Figure 9. TRC to ACIM Cable Diagram
Table 13. Accessory Connector 1 (J13)
J13 
Pin Number
Signal
1N/C
2N/C
3N/C
4ACIM_TXD
5N/C
6 ACIM_RXD
7N/C
8GND
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
To
Accessory 1
of the TRC
To the ACIM
ACIM_TXD
ACIM_RXD
GND
MAEPF-27878-O










