Knowledge base ZyXEL P660HW-T1 v2 ADSL2+ Settings
The ZyXEL P660HW-T1 v2 routers we supply sometimes do not do ADSL2+ full speeds and Annex M in their default configurations.
Here is how to modify the router's configuration in order to get the best speed out of your BT or BE ADSL2+ line:
ADSL2+ (BE or BT)
Sometimes the router reports ADSL2 DELT mode, and has low sync rates (~7 meg) on a line that can support more.
The ADSL2 DELT is a red herring.
This is a 7.1 meg max sync.
Telnet in, then type:
"sys edit autoexec.net"
Press "i"
You should see a colon
When you see the colon, type the following command:
"w dmt2 set largeD=2"
Press enter, then press "x".
You can verify that autoexec.net contains the new command by typing "sys view autoexec.net".
After a reboot, the sync rate should be increased.
This only applies to the T1v2.
Annex M (BE)
The router does not do Annex M by default; it needs forcing.
Telnet in, then type:
"sys edit autoexec.net"
Press "i"
You should see a colon
When you see the colon, type the following command:
"wan ghs set annex m"
Press enter, then press "x".
You can verify that autoexec.net contains the new command by typing "sys view autoexec.net".
After a reboot, the upstream sync rate should be increased, at the expense of some downstream.