Zyxel VES-1624FT-55A [277/312] Note it is not recommended to use daisychain mode in a loop topology
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Zyxel VES-1624FT-55A [277/312] Note it is not recommended to use daisychain mode in a loop topology

Zyxel VES-1624FT-55A [277/312] Note it is not recommended to use daisychain mode in a loop topology
Chapter 53 Troubleshooting
VES-1624FT-55A User’s Guide
277
53.6 DSL Data Transmission
The DSL link is up, but data cannot be transmitted.
53.7 There Is No Voice on an VDSL Connection
The IP DSLAM has internal POTS (Plain Old Telephone Service) splitters that allow the
telephone wiring used for VDSL connections to also simultaneously carry normal voice
conversations.
5 If you cannot ping, check the Ethernet cable and connections between the Ethernet port
and the Ethernet switch or router.
6 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.
Table 122 Troubleshooting Data Transmission (continued)
STEPS CORRECTIVE ACTION
Table 123 DSL Data Transmission Troubleshooting
STEPS CORRECTIVE ACTION
1 Check the switch mode and port isolation settings.
If an ADSL modem or router is connected to the port, check to see that the VPI/VCI and
multiplexing mode (LLC/VC) settings in the subscriber’s DSL modem or router match
those of the DSL port.
If the subscriber is having problems with a video or other high-bandwidth services, make
sure the IP DSLAM’s VDSL port’s data rates are set high enough.
2 Check the VLAN configuration.
3 Ping the IP DSLAM from the computer behind the VDSL modem or router.
4 If you cannot ping, connect a DSL modem to an VDSL port (that is known to work).
If the VDSL modem or router works with a different VDSL port, there may be a problem
with the original port. Contact the distributor.
5 If using a different port does not work, try a different VDSL modem or router with the
original port.
Table 124 VDSL Voice Troubleshooting
STEP CORRECTIVE ACTION
1 Ensure that the subscriber’s VDSL is working normally.
2 Make sure the subscriber has a POTS splitter properly installed.
3 Check the VDSL line pin assignments shown in Chapter 54 on page 283.
4 Check the telephone wire connections between the subscriber and the MDF(s).
5 Check the telephone wire and connections between the MDF(s) and VDSL port(s).
6 Check the telephone wire mapping on the MDF(s).
7 Make sure the in-house wiring works and is connected properly.
8 Repeat the steps above using a different VDSL port.

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