Spectracom SecureSync User Reference Manual page 346

5.3 Telecom Option Cards
T1 mode :
E1 mode :
Connector and Signal Type : Terminal block
Maximum Number of Cards : 6
Ordering Information : 1204-0A: T1/E1 (100/120 Ω) module
Figure 5-22:
Pin No.
1
2
3
4
5
6
330
1.544 MHz (square wave) frequency output
(2) 1.544 Mb/sec data rate outputs:
Outputs are DS1 framed all ones
Supports Super Frame (SF or D4) and Extended Super Frame (ESF)
SSM support
2.048 MHz (square wave) frequency output
(2) 2.048 Mb/sec data rate outputs:
Outputs are E1 frame all ones
Supports CRC4 and CAS Multiframe
SSM support
1.544/2.048 MHz RS-485
T1 according to GR-499-CORE (100 Ω)
E1 according to ITU-T G703 (120 Ω)
Model 1204-0A option card rear plate
Pin Assignments
Signal Function
GND Ground
1.544MHz/2.048MHz RS-485 A Terminal Square wave
1.544MHz/2.048MHz RS-485 B Terminal Square wave
GND Ground
T1/E1 output A1 GR-499/G.703
T1/E1 output B1 GR-499/G.703
Description
Ground
Ground
Tip
Ring
CHAPTER •
5 SecureSync User Reference Guide Rev. 18