Comtech EF Data CRS-300 - HSSI Connector, HD-50 F (CRS-336;370); Table 3-11. HSSI Connector

CRS-300 1:10 Redundancy Switch MN/CRS300.IOM
Switch Connectors and Pinouts Revision 19
3–12
3.2.2.8 HSSI Connector, HD-50F (CRS-336/370)
See Table 3-11 for the pinouts for the HD-50F SCSI-II (HSSI) User Data Interface connectors –
“J2” on the CRS-336 TMI, and “J1” on the CRS-370 TMI.
Table 3-11. HSSI Connector
Pin (+, -)
Signal Function
HSSI Signal
RS613 Circuit
Circuit Direction
1, 26
Signal Ground
SG
102
2, 27
Receive Timing
RT
115
from DCE
3, 28
DCE Available
CA
107
from DCE
4, 29
Receive Data
RD
104
from DCE
5, 30
N/A
N/A
N/A
N/A
6, 31
Send Timing
ST
114
from DCE
7, 32
Signal Ground
SG
102
8, 33
DTE Available
TA
108/2
to DCE
9, 34
Terminal Timing
TT
113
to DCE
10, 35
N/A
N/A
N/A
N/A
11, 36 Send Data SD 103 to DCE
12, 37
N/A
N/A
N/A
N/A
13, 38 Signal Ground SG 102
14,15,17,
18, 39-43
Reserved (to DCE) not used
16
Tx_Carrier_Off_L
Notes 1, 3
CO
undefined
from DTE
19, 44
Signal Ground
SG
102
20
Carrier Detect (lock)
Notes 1, 2
CD
undefined
from DCE
21-24,
46-49
Reserved (to DTE) undefined not used
25, 50
Signal Ground
SG
102
Notes:
1) Noted signal function names are non-HSSI defined signals. On Cisco™ routers, there is no connection to
those pins.
2) TTL - output.
3) TTL or EIA-232 (active low) input.