ABB Switzerland Ltd 1KHW001489-EN ETL600
3.3.6. DC-DC converter B4LE....................................................................3-29
3.3.7. Channel subrack P7LC ....................................................................3-29
3.3.8. 40 W power amplifier P1LA..............................................................3-29
3.3.9. Transmit filter E5TX .........................................................................3-30
3.3.10. Carrier combiner P3LG ....................................................................3-31
3.3.11. RF hybrids P3LE, dummy load P3LK...............................................3-32
3.3.12. Receive Filter P4RX.........................................................................3-35
3.3.13. Power supplies B5LA and B5LC ......................................................3-36
3.3.14. Power subrack P7LA........................................................................3-36
3.4. Analog Services .............................................................................3-38
3.4.1. Telephony ........................................................................................3-38
3.4.1.1. Point to point hot line (direct phone) ................................................3-38
3.4.1.2. Remote subscriber ...........................................................................3-39
3.4.1.3. 4-wire PAX connection with E&M signalling.....................................3-40
3.4.1.4. 2/4-wire PAX connection with E&M signalling and hybrid control ....3-40
3.4.1.5. E&M signaling ..................................................................................3-41
3.4.1.6. Service phone ..................................................................................3-41
3.4.1.7. Display E&M signaling at front LEDs ...............................................3-41
3.4.2. Teleoperation ...................................................................................3-42
3.4.2.1. Ports.................................................................................................3-42
3.4.2.2. Transit filters.....................................................................................3-43
3.4.3. External teleprotection .....................................................................3-44
3.5. Data Communication .....................................................................3-45
3.5.1. NSK600 Modem...............................................................................3-45
3.5.1.1. Data Regeneration with FSK Modems.............................................3-46
3.5.1.2. Required data transmission format parameter for DAPSK ..............3-47
3.5.2. MOD600 Modem..............................................................................3-47
3.5.3. MUX600 DPLC Channel Multiplexer and V.24 Port Sharing ...........3-49
3.5.3.1. DPLC Channel Multiplexer...............................................................3-50
3.5.3.2. V.24 Port Sharing.............................................................................3-51
3.5.4. Data Port Interfaces .........................................................................3-51
3.5.4.1. G.703 (not supported with ETL600 Release 1)................................3-52
3.5.4.2. V.11..................................................................................................3-52
3.5.4.3. V.24..................................................................................................3-52
3.6. Internal Teleprotection ..................................................................3-53
3.6.1. Introduction ......................................................................................3-53
3.6.2. Intended use of NSD600..................................................................3-54
3.6.3. Structure of NSD600 ........................................................................3-55
3.6.4. Features ...........................................................................................3-56
3.6.5. Applications......................................................................................3-58
3.6.5.1. Permissive Tripping Schemes..........................................................3-59
3.6.5.2. Direct Transfer Tripping ...................................................................3-59
3.6.5.3. Blocking Schemes............................................................................3-60
3.6.5.4. Unblocking .......................................................................................3-61
3.6.5.5. Protecting Dual-Circuit Lines............................................................3-62
3.6.5.6. Protecting Single-Circuit Lines .........................................................3-63
3.6.5.7. Phase Segregated Line Protection ..................................................3-65
3.6.5.8. Relaying Tripping Signals Through Intermediate Stations ...............3-65
II November 2005 Contents