Comtech EF Data CRS-400 - Manual (Page 33)

CRS-400 1:8 Redundancy Switch Revision 0
Installation and Setup MN/CRS400.IOM
17
HSSI/EIA-613 Interface Connector Pinout -- J6 / J7 To modem J5 To User
Signal Function HSSI
Signal
EIA-613
Circuit
Pin # (+, -) Circuit
Direction
Comment Pin # (+, -)
Demod Fault
(Notes 1 and 3)
DF undefined 45 from DCE Demodulator unused
Mod Fault
(Notes 1 and 3)
MF undefined 21 from DCE Modulator unused
Reserved (to DTE) 46 unused unused
RX PSYNC (Note 1) RPSYNC undefined 22, 47 from DCE Demodulator unused
RX DVALID (Note 1) RDVALID undefined 23, 48 from DCE Demodulator unused
Test Mode TM 142 24, 49 from DCE Mod/Demod unused
Signal Ground SG 102 25, 50 Mod/Demod 25, 50
Notes:
1) Noted signal function names are non-HSSI defined signals. On Cisco routers there is no
connection to those pins. Refer to the Comtech EF Data web site for an Application Note
describing the use of the SDM-2020 with Cisco routers.
2) TTL - output.
3) TTL – open collector output.
The HSSI interface uses the type of SCSI-2 connector shown in Figure 2-3.
Figure 2-3 SCSI-2 (ECL/HSSI) Connector, Pin Locations