ATL Telecom OM25 - Manual (Page 5)

5
ATL User Guide
OM25 O Optical M Modem
1 INTRODUCTION 9
2 EXAMPLE APPLICATIONS 10
3 CONSTRUCTION 11
3.1 FRONT PANEL 11
3.1.1 LEDS 11
3.1.1.1 STATUS 11
3.1.1.2 OPTICAL 11
3.1.1.3 INTERFACE 11
3.1.1.4 MASTER (GREEN) 12
3.1.1.5 TEST (RED) 12
3.1.1.6 LOOPS (AMBER) 12
3.1.2 BUTTONS 12
3.1.3 TERMINAL PORT 12
3.2 REAR PANELS 12
3.2.1 DC VARIANT 12
3.2.2 AC VARIANTS 13
3.2.3 REAR CONNECTORS COMMON TO AC & DC VARIANTS 13
4. INSTALLATION 14
4.1 PROTECTIVE EARTH 14
4.2 POWER ON SEQUENCE 14
4.3 DEFAULT SETTINGS 15
5. INTERFACES & TIMING OPTIONS 16
5.1 V.35 INTERFACE 16
5.1.1 USER RATE 16
5.1.2 END TO END SIGNALLING 16
5.1.3 SIGNALLING CIRCUIT OPTIONS 16
5.1.4 EXTERNAL TIMING 16
5.1.5 ENABLE LOOPS 17
5.1.6 FUNCTIONAL OPERATION 17
5.2 G.703 INTERFACE 18
5.2.1 TIMING MODES 18