Comtech EF Data OM20 - Manual (Page 72)

OM20 Universal Outdoor Modem Rear Panel Interfaces
MN-OM20– Revision 5 5–6
23 Send Timing B (+) ST-B Output 12
24 No Connect --- --- 25
25 Clear To Send B (+) CS-B Output 13
Table 5.4.cont. EIA-530 Synchronous Data I/O; ES-ES Async Data Connector (J3)
J3
Pin No.
Signal Name Signal Direction EIA-530 Std.
25 Pin
Connector
Reference
26 Transmit Data B (ES-ES) TXD_B Input N/C
27 Transmit Data A (ES-ES) TXD_A Input N/C
30 Receive Data A (ES-ES) RXD_A Output N/C
31 Receive Data B (ES-ES) RXB_B Output N/C
Table 5.4a. G.703 Balanced (J3)
J3
Pin No.
Signal Name Signal Direction G.703
Balanced
15 Pin
Connector
Reference
32 Send Data (-) SD-A Input 1
35 Receive Data A (-) RD-A Output 3
34 Ground GND --- 4
33 Send Data (+) SD-B Input 9
36 Receive Data B (+) RD-B Output 11
37 Mod Fault MOD-
FLT
Open
Collector
Output
14
29 Demod Fault DMD-
FLT
Open
Collector
Output
15
5.1.4 ETHERNET DATA/M&C (J4)
The Ethernet Data/M&C Port (J4) is dedicated for Ethernet communications. This port is
configured for 10/100 Base-T communication protocols, and can be used to Monitor & Control
the unit with the GUI interface functions of the unit and/or send and receive baseband data (if
equipped with the optional Ethernet data interface) The interface Complies with IEEE 802.3 and
IEEE802.3u. The physical interface (J4) is a standard male RJ45 Connector. A mating RJ45
weatherproof shroud is included with the standard unit. The terminating connector number is a
standard female RJ45. Ethernet cabling and connector is no included unless specified as an
option at the time of order.