Comtech EF Data CDM-425, Инструкция по установке и эксплуатации

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CDM-425 Advanced Satellite Modem
Revision 0
Rear Panel Connectors and Pinouts 3–7 MN-CDM-425
(R>L)
Pin #
Generic Signal Description Direction
EIA-422
EIA 530
V.35 HSSI LVDS
Circuit
#
22
Data Set Ready B (NOTE 2) Modem to DTE DM B – – – –
9 Receive Clock B Modem to DTE RT B SCR B RT B RT B 115
21 (NOTE 2)
8 Receiver Ready A Modem to DTE RR A RLSD CA A RR A 109
20 (NOTE 2)
7 Signal Ground – SG SG SG SG 102
19 Request to Send B * DTE to Modem RS B - TA B – 105
6 Data Set Ready A (NOTE 2) Modem to DTE DM A DSR – – –
18 (NOTE 2)
5 Clear to Send A *
Modem to DTE CS A CTS – – 106
17 Receive Clock A Modem to DTE RT A SCR A RT A RT A 115
4 Request to Send A * DTE to Modem RS A RTS TA A – 105
16 Receive Data B Modem to DTE RD B RD B RD B RD B 104
3 Receive Data A Modem to DTE RD A RD A RD A RD A 104
15 Internal Transmit Clock A Modem to DTE ST A SCT A ST A ST A 114
2 Transmit Data A
DTE to Modem SD A SD A SD A SD A 103
14 Transmit Data B DTE to Modem SD B SD B SD B SD B 103
1 Shield – Shield FG Shield Shield 101
Notes:
1. When the rear-panel Light Emitting Diode (LED) marked “1:N Active!” is OFF, all of the signals shown above are
available and functional. In addition, pins not shown are not connected, and therefore no damage will occur if
other signals are connected to the additional pins.
2. When the rear-panel LED marked “1:N Active!” is ON, the signals shown highlighted are no longer available.
Furthermore, pins 6, 18, 20, 21, 22, 23 and 25 are reserved for use by the 1:N system. DO NOT connect signals
to any of these pins in this mode. Certain pins have Direct Current (DC) voltages present that may damage
equipment other than a Comtech EF Data redundancy switch.
3. For X.21 operation, use the EIA-422 pins, but ignore Receive Clock if the Modem is Data Terminal Equipment
(DTE), and ignore Transmit clocks if the Modem is Data Circtui-termination Equipment (DCE).
4. For Intermediate Data Rate (IDR) operation using G.703, this primary interface becomes the 8 kbps EIA-422
overhead channel.