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Rear Panel Interfaces
All balanced rates use Pins 1 (-) and 9 (+) of DB-15 connector J14.
Data Rate
G.703 Rate
(Mbps)
E1
2.048
E1
2.048
T1
1.544
E2
8.448
T2
6.312
T2
6.312
E3
34.368
T3
44.736
STS-1
51.84
5.14 HSSI Interface
The HSSI (High-Speed Serial Interface) complies with the HSSI Functional and Electrical
Specifications. The physical interface is a 50 Pin SCSI-2 Type Connector. Electrical levels are
ECL. The pinouts for this interface are listed in Table 5-9.
Table 5-9. J9 – HSSI (High-Speed Serial Interface) 50-Pin Connector
Pin No. (+)
Pin No. (–)
1
2
3
4
5
6
7
8
9
5-10
Table 5-8. Available G.703 Interfaces
Wire Type
Coax
J11 Female BNC
Pair
Pair
Coax
J10 Female BNC
Coax
Pair
Coax
Coax
Coax
Signal Name
26
SG
27
RT
28
CA
29
RD
30
LC
31
ST
32
SG
33
TA
34
TT
DM240-DVB High-Speed Digital Modulator
Impedance
Connector
(Ohms)
J14 DB-15
J14 DB-15
J9 Female BNC
J14 DB-15
J8 Female BNC
J8 Female BNC
J8 Female BNC
Description
Signal Ground
Receive Timing
DCE Available
Receive Data
Loopback Circuit C
Send Timing (SCT)
Signal Ground
DTE Available
Terminal Timing (SCTE)
Coding
75
HDB3
120
HDB3
100
AMI/B8ZS
75
HDB3
75
B8ZS
110
B6ZS
75
HDB3
75
B3ZS
75
B3ZS
Direction
---
Output
Output
Output
Output
Output
---
Input
Input
TM083 - Rev. 3.0
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