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 connecto
r