Tut Systems XL-12000S manual Troubleshooting TUT Systems

XL-12000S

MANAGED, HIGH-SPEED NETWORK MODEM USER GUIDE

Both modems are configured as Masters or Slaves. Verify by checking both modems’ configurations in the “C” Modem Configuration screen. Make sure that one of the modems is a Master and the other is a Slave. Check all patch cables to be sure the pinout is correct and connections are well seated.

4.The DSL Link LED blinks for a long time.

Blinking for a long time can indicate failure to communicate with the other modem within the acceptable noise parameters or that the distance between modems exceeds 12,000 feet. Verify the length of the DSL line and ensure it meets the length limits described in “Appendix C”. If it meets the limits, then have the line tested for defects.

Blinking a few times (2 or 3) indicates that both modems are in Master mode. Verify by checking both modem configurations in the “C” Modem Configuration screen. Make sure that one of the modems is a Master and the other is a Slave. A Master modem will send out a pulse on the wire to try and communicate with a Slave modem. If both modems are configured as Master they are sending out these pulses and receiving a pulse from the remote end thinking it’s a Slave. Upon further examination, the modem determines it’s not a Slave and continues to try and send out a pulse.

5.The 10Base-T LED never illuminates.

If connecting to a hub, make sure the Ethernet connection switch on the back of the modem is set to “Normal”. Check the hub to see that its link light is illuminated. If the light is still not illuminated, try a different straight-through cable.

If connecting to a PC, server or workstation, make sure the Ethernet connection switch on the back of the modem is set to “Crossed”. Verify the link light is illuminated on the PC.

If the 10Base-T cable being used was not the cable provided, make sure it adheres to the pinout assignments for 10Base-T (see Appendix A).

10.0 TROUBLESHOOTING TUT SYSTEMS 53