Browse Author

Muhammad Bajwa

Disable SIP ALGs on Draytek Routers

Many commercial routers now a days are coming with SIP ALG`s turned on by default. This feature is suppose to help with Nat related issues but in majority it break the implementation and cause issues such as one way audio, lack of incoming calls, registration issues and etc.

Recently, We have received couple of calls regarding IP phones not working behind DreyTek routers. The reason is same SIP ALG.

If you are a victim of this feature please disable it using the following procedure.

Telnet into the router and enter the following command.

1. > sys sip_alg 0 — Disables sip alg

2. > sys commit — Apply changes

3. > sys reboot — Reboot router

Once router is back online, reboot the ip phone or press re-register.

M3 HS Speaker problem

Recently, customers have reported that M3HS speakers are creating problems for them.

Some of the main issues are

1) Voice keeps cutting off during a call on speakers
2) M3 HS ringer not working
3) Voice quality is poor

Good news is, there is a firmware update that resolve most of these issues.

<%ThickBox(http://blog.provu.co.uk/media/5/20100630-unnamed.jpg|Snom M3)%>

I’d like to encourage all of you (who are still using an M3) to perform an update to this version following the instructions here:

http://wiki.snom.com/Snom_m3/Firmware/Beta

Please report any issues you might encounter.