Verilink Productivity 500 (34-00236) Product Manual - Manual (Page 80)

Page 80 500 TA Troubleshooting Guide
• What tests (if any) you have run and what the results were (loopback test for
example)
• LED status indications (if your unit has LED indicators)
If you are using a communications software package on your PC, see if it has a
terminal emulation mode so that you can communicate directly with the 500
TA. This will allow you to enter AT commands directly to the 500 TA, and see
the responses on the screen.
When power is turned on, nothing happens.
The 500 TA may not be getting power.
• Check to be sure the power adapter is plugged in to a live outlet.
The 500 TA will not communicate or establish a link to the network
switch.
• Ensure the ISDN cable is connected.
• Try performing a network restart.
• Verify that the VS and DS LEDs are on but not blinking. If the VS LED is
red or blinking, voice operation may not be properly configured. Likewise, if
the DS LED is off, data operation may not be properly configured.
• Verify that the switch type and version settings are for the correct switch.
• Verify that the Directory Numbers (DNs), SPIDs, and TEI values match
those agreed to at subscription time with the network provider. Also check
that the switch options have been saved into the stored profile and the net-
work link has been restarted.
• Verify that the network switch supports Northern Telecom ISDN Basic Rate
Access on the user-network interface and functional mode operation in the
layer 3 user network signaling, or AT&T ISDN Basic Rate Access 5ESS
generic program 5E4.2 or above for a TYPE A terminal, or National ISDN-1
Basic Rate Access for a basic (non-EKTS) terminal.
• @BULLET DOUBLE = Verify that for Northern Telecom and National
ISDN-1, EKTS and CACH are turned off at the switch and there are no sup-
plementary data services turned on.
The 500 TA appears to power up correctly, but does not respond to AT
commands sent from the PC.
The TD LED indicates if the 500 TA is receiving any data from the PC. If the
TD LED does not blink when the PC sends an AT command, the problem may
be in the PC or the cable:
• Check your PC. Make sure that the PC is configured properly and is set up to
communicate using the correct port.
• Check the PC cable. Is it connected properly?