User's 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
Troubleshooting | 198
Interface loopbacks
The interface loopback provides a loopback connection for the customer-connected equipment. All
traffic arriving from the customer interface is looped back.
These loopbacks are applied on a port-by-port basis and can only be enabled on active ports i.e. has
to be activated by assigning traffic to it by the Cross Connections application.
The interface card green LED flashes while the loopback is active.
Loopback type Description
QJET
(whole tributary)
The QJET interface loopback will loop back the selected E1 / T1 port.
QJET
(individual timeslot)
The Cross Connections application can loopback framed E1 / T1 timeslots
(see "
6Timeslot loopbacks” on page 198).
Q4EM port The Q4EM interface loopback will loop back the port 4 wire analogue path
to the customer.
DFXO port The DFXO interface loopback will loop back the port digital paths to return
the port analogue signal back to the customer.
DFXS port The DFXS interface loopback will loop back the port digital paths to return
the port analogue signal back to the customer.
HSS port The HSS interface loopback will loop back the port data to the customer.
QV24 port The QV24 interface loopback will loop back the port data to the customer.
Ethernet No loopback possible.
Timeslot loopbacks
You can loopback framed E1 / T1 timeslots in the Cross Connections application.
1. Open the Cross Connections application.
2. Right-click the timeslot you want to loop back.
3. Select Timeslot Loopback - the looped timeslot will display in black: