Dsl Data Transmission; There Is No Voice On An Adsl Connection; Table 86 Dsl Data Transmission Troubleshooting; Table 87 Adsl Voice Troubleshooting - ZyXEL Communications IES-1248-51 User Manual

Table 85 Troubleshooting Data Transmission (continued)
STEPS
4
5
6

51.6 DSL Data Transmission

The DSL link is up, but data cannot be transmitted.

Table 86 DSL Data Transmission Troubleshooting

STEPS
1
2
3
4
5

51.7 There Is No Voice on an ADSL Connection

The IES-1248-51 has internal POTS (Plain Old Telephone Service) splitters and CO side
Telco-50 connectors that allow the telephone wiring used for ADSL connections to also
simultaneously carry normal voice conversations.

Table 87 ADSL Voice Troubleshooting

STEP
1
2
3
4
Chapter 51 Troubleshooting
CORRECTIVE ACTION
Ping the IES-1248-51 from a computer behind the peer Ethernet device.
If you cannot ping, check the Ethernet cable and connections between the Ethernet port
and the Ethernet switch or router.
Check the switch mode. In daisychain mode, if you have a loop topology and enable
RSTP, it is possible for RSTP to disable Ethernet port 1 (the uplink port).
Note: It is not recommended to use daisychain mode in a loop topology.
CORRECTIVE ACTION
Check the switch mode and port isolation settings.
Check to see that the VPI/VCI and multiplexing mode (LLC/VC) settings in the
subscriber's ADSL modem or router match those of the ADSL port.
If the subscriber is having problems with a video or other high-bandwidth services, make
sure the IES-1248-51's ADSL port's data rates are set high enough.
Check the VLAN configuration.
Ping the IES-1248-51 from the computer behind the ADSL modem or router.
If you cannot ping, connect a DSL modem to an ADSL port (that is known to work).
If the ADSL modem or router works with a different ADSL port, there may be a problem
with the original port. Contact the distributor.
If using a different port does not work, try a different ADSL modem or router with the
original port.
CORRECTIVE ACTION
Make sure the subscriber has a POTS splitter properly installed.
Check the ADSL line pin assignments shown in
Check the telephone wire connections between the subscriber and the MDF(s).
Check the telephone wire and connections between the MDF(s) and USER port(s).
IES-1248-51 User's Guide
Appendix C on page 375.
361