8 hssi – hd-50f connector (crs-336/370) – Mocomtech CRS-300 User Manual
Page 177
CRS-300 1:10 Redundancy Switch
Revision 16
Connector Pinouts
MN/CRS300.IOM
6–9
6.2.8
HSSI – HD-50F Connector (CRS-336/370)
Table 6-11 is for the HD-50F SCSI-II TMI User Data Interface connector (HSSI): J2 on the
CRS-336, and J1 on the CRS-370.
Table 6-11. 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
1, 3
CO undefined
from
DTE
19, 44
Signal Ground
SG
102
20
Carrier Detect (lock)
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.
TMI User Data Interface:
HSSI connector