High-Speed Serial Interface (Hssi) Cables - 3Com 3C8S5007 - SuperStack II PathBuilder S500 Switch User Manual

High-speed Serial
Interface (HSSI)
Cables
You can use the WAN 1 and WAN 2 connectors and a HSSI cable to
connect a PathBuilder switch to a CSU/DSU device.
Figure 43 HSSI Cable
To NETBuilder II HSSI module
50-pin male connector
Signal Ground
Receive Signal Element Timing
DCE Available
Receive Data
Looback Request
Transmit Signal Element TIming
Signal Ground
DTE Available
Terminal Timing
Loopback Circuit A
Send Data
Loopback Circuit B
Signal Ground
5 ancillary to DCE
Signal Ground
5 ancillary to DCE
Signal Ground

High-speed Serial Interface (HSSI) Cables

Signal Name Pin
Pin
SG 1, 26
26, 1
RT 2, 27
27, 2
CA 3, 28
28, 3
RD
29, 4 4, 29
LR 5, 30
30, 5
TT 6, 31
31, 6
SG 7, 32
32, 7
TA 8, 33
33, 8
TT
34, 9 9, 34
LA 10, 35
35, 10
SD 11, 36
36, 11
LB 12, 37
37, 12
SG 13, 38
38, 13
39, 14 14, 39
SG 15, 40
40, 15
16, 41
41, 16
SG 17, 42
42, 17
18, 43
43, 18
44, 19 19, 44
20, 45
45, 20
21, 46
46, 21
22, 47
47, 22
23, 48
48, 23
49, 24 24, 49
25, 50
50, 25
To CSU/DSU
50-pin male connector
Signal
Name
Signal Ground
SG
RT Receive Signal Element Timing
DCE Available
CA
Receive Data
RD
Looback Request
LR
Transmit Signal Element Timing
TT
SG Signal Ground
DTE Available
TA
Terminal Timing
TT
Loopback Circuit A
LA
Send Data
SD
LB Loopback Circuit B
Signal Ground
SG
5 ancillary to DCE
SG
SG
Signal Ground
5 ancillary to DCE
Signal Ground
105