Specifications

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SS 4.2 Installation and Operation Manual
INSTALLATION
The SS 4.2 is supplied with a X-Over modular cable and a (S9) 9-pin D-connector
modular adapter for serial control. Only use the modular cord that is supplied with
the SS 4.2 or a replacement that reverses (X-over), such as Radio Shack Cat No.
279-0347. Connect the cable between the SS 4.2 and your computer. The SS 4.2
may operate at baud rates from 2400 to 38400 baud. The unit is shipped set for 9600
baud, with 8 data bits, no parity and one stop bit. Load your favorite communica-
tion software package (Procomm, Bitcom, Windows 3.1/3.11 Terminal, Windows
95/98/ME/NT/2000/XP Hyper Terminal, etc.) Using the protocol of 9600-N-8-1.
Set the mode to: DIRECT, Flow Control to: NONE and emulation to: ANSI.
Connecting Two SS 4.2’s To A Single Computers Serial Port:
Multiple SS 4.2’s may be cascaded serially to operate from the same serial port. The
first step is to assign ID’s to each SS 4.2. One suggestion is to assign 1 to the first
SS 4.2 and 2 to the second switcher. The second step is to parallel the serial ports of
the SS 4.2’s. Plug the male end of the duplex modular adapter into the supplied
female (S9) DB-9 to RJ-11 adapter, then attach the supplied modular line cords into
each of the duplex modular adapter receptacles (Radio Shack Cat No. 279-0357) and
the other ends into each SS 4.2 modular receptacles. See the diagram below.
NOTE: Three or more SS 4.2’s may be daisy chained by using the above descrip-
tion and a Radio Shack Cat No. 279-0410, 5-jack modular adapter.
Serial Control:
The unit is controlled in either Menu or Burst mode. It can run at the following data rates:
• 2400
• 9600 Default
• 19,200
• 38,400
Serial communications is multi-drop RS-232. Commands may be entered either via
a menu (menu mode) or a short form code (burst mode). All commands and respons-
es use normal ASCII characters, facilitating scripting. A burst mode command starts
with an asterisk (“*”) followed by the device (ID) address as a single decimal digit.
A burst mode command must be entered within 5 seconds or it will time out. The
command to enter menu mode starts with a space (“ “) followed by the device (ID)
address as a single decimal digit. The menu mode displays certain parameters, and
allows the setting of the command serial communications rate (“baud rate”), front
panel lockout mode, silence sensor delay, silence sensor restore and the selection of
audio inputs and outputs. In both cases, device (ID) address (0-3) is specified in the
on-board dipswitches.