Useful Zyxel P660 series modem commands, including changes to SNR targets and NAT loopback.
Accessing the modem command-line interpreter
Enter the command-line menu by telnet-ing to your modem's IP address and then, either:
- menu item 24.8
- directly with later modem versions.
To allow direct access to your external (WAN) IP address:
The steps below make the change permanent, although the command can equally be used at the normal ras> prompt which will survive until the next power-off/reboot:
- sys edit autoexec.net
- ip nat loopback on
To alter the ADSL target SNR:
- wan adsl targetnoise [0xfa .. 0x06]
final number is in units of 0.5dB, so 0x06 is equivalent to a +3dB increase in the target (improved stability).
To disable rate adaption:
- wan adsl rateadap off
To adjust the stale session timeouts:
- sys tos timeout icmp 60
- sys tos timeout udp 45
Note: these commands need to be put into the autoexec.net (note not autoexec.bat!) file in order to survive a power-off/reboot.