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© MiMOMax 2013 Four Wire Audio
Interface Manual
5.2.2
Cabling and Connectivity
Image Showing HSSI Cable Connected. Note Shielded Plug.
The recommended cable for the HSSI connection is shielded twisted pair similar to Belden
1868E fitted with a shielded RJ-45 plug.
HSSI-A Connector (RJ45 socket)
Provides direct connection to MiMOMax Radio Unit. Utilises a one-to-one connecting lead (shielded cable and plugs).
Pin
Signal
Description
1,2
Transmit Data
Data Output To Radio Unit
7,8
Transmit Timing
Data Timing To Radio Unit
4,5
Receive Data
Data Input From Radio Unit
3,6
Receive Timing
Data Timing From Radio Unit
Shield
Ground
Cable Shield
For connection between the Radio Unit and FWA interface a one-to-one cable is used as
defined in the following table. Radio Unit signals conform to the DCE convention while the
Four Wire Audio interface signals conform to the DTE convention.
RU to FWA interface HSSI Cable
FWA unit : RJ45
Radio Unit : RJ45
Signal
Pin
Pin
Signal
Tx Clock A (output)
8
8
Tx Clock A (input)
Tx Clock B (output)
7
7
Tx Clock B (input)
Tx Data A (output)
2
2
Tx Data A (input)
Tx Data B (output)
1
1
Tx Data B (input)
Rx Clock A (input)
6
6
Rx Clock A (output)
Rx Clock B (input)
3
3
Rx Clock B (output)
Rx Data A (input)
5
5
Rx Data A (output)
Rx Data B (input)
4
4
Rx Data B (output)
Shield / GND
(1)
Body
Body
Shield / GND
NOTE (1): At the Radio Unit GND is isolated from chassis ground. Connection of the ground at each end is required
to ensure correct operation.
