21
© MiMOMax 2013 Four Wire Audio
Interface Manual
5
DATA INTERFACES
1
8
A
B
1
8
A
B
1
8
A
B
RJ45 Plug (standard and shielded)
RJ45 Socket
Stacked RJ45 Socket
RJ45 Pin Numbering
5.1
A
SYNCHRONOUS
S
ERIAL
(COM)
5.1.1
Overview
The COM port provides for EIA232 connectivity for end-to-end communications such as Inter
Site Signalling for MPT systems. The supported data rate is 9600 bps.
While no error correction or retry capability is provided an internal 256 byte buffer preserves
data during Radio Unit link anomalies and to support On-Demand (M-PoD) systems. A 200ms
timeout is applied to prevent stale data persisting in the buffer.
232
232
8
6
3
5
1
2
4
Recieve Data
Transmit Data
COM (EIA232) Port
Shield
UART
Data
Four Wire Audio Unit
232
232
NOT USED
NOT USED
7
Circuit Overview
5.1.2
Cabling and Connectivity
