Comtech EF Data SMS-458B - Manual (Page 101)

SMS-458B Modem Protection Switch Revision 2
Cable Configuration MN/SMS458B.IOM
A–5
A2 / A10
BACKUP MODEM I/O
DATA458 BK-UP
J3
PR1 MODEM DATA I/O
A2 / A1-A2
DATA458 PR1
J6
PR2 MODEM DATA I/O
A2 / A3-A4
DATA458 PR2
J6
PR3 MODEM DATA I/O
A2 / A5-A6
DATA458 PR3
J3
PR4 MODEM DATA I/O
A2 / A7-A8
DATA458 PR4
J6
SDM-2020M BK-UP
DAT I/O
TX / IF OUT
REMOTE
AUX
MONITOR
IF INPUT
ALARM
J1
J5
CP1 J3
SDM-2020M PR1
DAT I/O
TX / IF OUT
REMOTE
AUX
MONITOR
IF INPUT
ALARM
J1
CP1
J5
J3
SDM-2020M PR2
DAT I/O
TX / IF OUT
REMOTE
AUX
MONITOR
IF INPUT
ALARM
J1
CP1
J5
J3
SDM-2020M PR3
DAT I/O
TX / IF OUT
REMOTE
AUX
MONITOR
IF INPUT
ALARM
J1
CP1
J5
J3
SDM-2020M PR4
DAT I/O
TX / IF OUT
REMOTE
AUX
MONITOR
IF INPUT
ALARM
J1
CP1
J5
J3
J1
J3
J3
J6
J3
SMS-458 (A2)
MOD BACKUP
MOD PRIME 1
MOD PRIME 2
MOD PRIME 3
MOD PRIME 4
MODEM CNTL INTF J3
J26
J18
J19
J20
J21
AC 1
AC 2
CGND
AC IN
Figure A-2. SMS-458B Installation Schematic for SDM-2020 Modulator
(TX Only) with G.703 Data Interface