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