User's Manual

User Guide | FreeSpeak II™
Page 41
4.4.4 Connecting with other digital matrix intercom systems
Because FS II features standard 4-wire ports, with an input pair and an output
pair, virtually any 4-wire signal can be connected with it. Make sure to properly
match the input and output pairs between the digital matrix port and the FS II 4-
wire port (see diagram below).
The pinouts for the first two 4-wire ports contain both audio and data
connections, though the data connections are not currently used. Those pinouts
are shown in the following table.
Pin Function
1 Data Tx+
2 Data Tx–
3 Audio
Out+
4 Audio In+
5 Audio In–
6 Audio Out–
7 Data Rx+
8 Data Rx–
Table 4-3 Pinouts for connecting to other digital matrix intercom systems
The remaining two 4-wire connections are audio only, and the data connections
are unterminated (see Table 4-2 FS II Base station 4-wire pinout).
Within the configuration software of the other digital intercom system, configure
its connected port to 4-wire or similar. Adjust the input and output levels either at
matrix side or within the FS II front-panel display for the particular FS II 4-wire
port.
4.4.5 Connecting with other 4-wire devices
Various other 4-wire audio devices can be connected with FS II. The Clear-Com
EF-701M 4-wire interface can be used to attach additional partyline channels to
FS II, converting them from partyline on the wired side to 4-wire on the FS II
side.
The Clear-Com IF4W4 interface can be used similarly. The audio input side of the
FS II 4-wire connectors could be used for additional program or other audio inputs
that could then be accessed by FS II beltpacks. The audio output side of the FS II