User Manual
Table Of Contents
- 1. Getting started
- 2. Introduction
- 3. Preparation
- 4. About the terminal
- 5. Mounting and installing the terminal
- 6. Connecting to the terminal
- 7. Managing the terminal
- 8. Configuring the terminal
- 9. Configuring the traffic interfaces
- 10. Cross Connections
- Embedded cross connect switch
- The Cross Connections application
- The Cross Connections system requirements
- Installing the Cross Connections application
- Opening the Cross Connections application
- The Cross Connections page
- Setting the terminal's address
- Management and user ethernet capacity
- Setting card types
- Getting cross connection configuration from the terminals
- Creating cross connections
- Sending cross connection configuration to the terminals
- Saving cross connection configurations
- Using existing cross connection configurations
- Printing the cross connection configuration
- Deleting cross connections
- Configuring the traffic cross connections
- Cross connection example
- Symmetrical Connection Wizard
- 11. Protected terminals
- 12. In-service commissioning
- What you will need
- Checking the antenna polarization
- Visually aligning antennas
- Accurately aligning the antennas
- Synchronizing the terminals
- Checking performance
- Checking the receive input level
- Checking the fade margin
- Checking long-term BER
- Bit Error Rate tests
- Additional tests
- Checking the link performance
- Viewing a summary of the link performance
- What you will need
- 13. Maintenance
- 14. Troubleshooting
- 15. Interface connections
- 16. Alarm types and sources
- 17. Country specific settings
- 18. Specifications
- Ethernet interface
- QJET Quad E1 / T1 interface
- Q4EM Quad 4 wire E&M interface
- DFXO Dual foreign exchange office interface
- DFXS Dual foreign exchange subscriber interface
- QV24 Quad V.24 asynchronous data interface
- HSS Single high speed synchronous data interface
- External alarm interfaces
- Auxiliary interfaces
- AC Power supply
- DC Power supply
- Power consumption
- MHSB protection
- Ethernet interface
- 19. Product end of life
- 20. Abbreviations
- 21. Acknowledgments and licensing
- 22. Commissioning Forms
- 23. Index
Configuring the traffic interfaces | 104
7. Select the DFXO Impedance
This option sets the DFXO line termination impedance and the hybrid balance impedance to the
same value.
Selection Description
600 Standard equipment impedance Default
600 + 2.16 uF Standard equipment impedance with low frequency roll-off
900 Typically used on loaded cable pairs
900 + 2.16 uF Typically used on loaded cable pairs with low frequency roll-off
TN12 Standard complex impedance for Australia
TBR21 Widely deployed complex impedance
BT3 Standard complex impedance for New Zealand
BT Network Standard complex impedance for UK
China Standard complex impedance for China
On a short line (< 100 metres), the selected impedance should match the impedance of the
exchange line card.
On a long line (> 1000 metres), the selected impedance should match the impedance of the
exchange line card as seen through the line.
If you are not sure what the expected impedance value should be, check with the exchange
equipment supplier.
8. Enable the DFXO Echo Canceller if required.
The DFXO Echo Canceller provides up to 64 ms of echo cancellation. This feature is only
available on Rev D (and later) DFXO cards.
Analogue data devices e.g. modems send a disable signal to disable any echo canceller in circuit
while it trains its own echo canceller. There are two possible disable signals. ITU G.164 specifies a
disable signal of a single 2100 Hz tone and ITU G.165 specifies a disable signal of 2100 Hz tone
with phase reversals every 450 ms.
Selection Description
Off No echo canceller operation. Default
On Echo canceller operational but without disabling.
Auto Disable
G.164
Echo canceller operational with automatic disabling using ITU G.164
2100 Hz tone.
Auto Disable
G.165
Echo canceller operational with automatic disabling using ITU G.165
2100 Hz tone with phase reversals every 450 ms.