All firewalls in their OmniGuard range are known to work and have full QOS feature set to ensure quality is a good as as it can be. Aimed at SOHO and Enterprise.
This device works but does have SIP ALG on the router which requires disabling. When SIP ALG is enabled, devices register and calls generally work but presence and some other functions fail.
When you log into the router go to WAN setup then select "Disable SIP ALG". Reboot and all should work.
Note, this device does not have any quality features so although it works, in a larger busy office voice quality may degrade and a slightly more functional device may be required.
Babblevoice have had good results with this device. SOHO.
Forza IT successfully configured Babblevoice to work with the v8 device but found it necessary to disable SIP/ALG functionality using the telnet interface of the router in order for the router to properly pass SIP traffic.
This is how you disable SIP/ALG on the Thomson TG585 should you need to:
- Bring up a telnet command prompt:
- Open 192.168.1.254 or whatever IP your router is
- Type in your username and password for the router, default is "Administrator" and password is blank
- Type menu
- look for connection>unbind> application
- application=choose sip (press enter key to bring choices up)
- port= enter 5060 press enter then choose OK
- Re-boot router
Alternatively if "menu" is not available then
- type connection unbind application=SIP port=5060 press enter
- type saveall press enter
- type exit press enter
- Re-Boot router
The 660 range of routers all come with SIP ALG enabled by default and pretty much break everything. To disable:
- telnet router
- Menu option "24. System Maintenance".
- Menu option "8. Command Interpreter Mode".
- ip nat service sip active 0
With this in place we have had good results on this router - a SOHO device.
Also we like to upgrade the firmware if possible here's a link to a youtube video about upgrading the firmware;
A very configurable router, but SIP ALG needs to be switched off.
Therefore telnet to the router (default username is Administrator / no password)
At the command line type;
connection unbind application=SIP port=5060
These routers are regarded as the Rolls Royce of SOHO routers but some models have created a few problems with VOIP services including babblevoice.
The issues are:
- No caller ID presented to phones plugged into the on-board phone ports (we believe this is to do with international settings but there do not appear to be any settings for this)
- No support for SRV records - there is a high probability that anyone delivering VOIP service will rely on SRV records
- One way audio - We have looked into this and the Draytek firewall actively blocks inbound traffic even though connections are setup correctly.
We believe the following devices are affected - but probably others as well
- Draytek 2820n
- Draytek 2710v
- Draytek 2600
However, a couple of babblevoice resellers (Bean IT and Forza It and oyrselves) have done some work and the following routers / firmware combination do work;
- Draytek 2830Vn at firmware Version 220.127.116.11_2471201 (build May 4 2012 15:05) and with SIP-ALG disabled.
- Draytek 2850Vn, SIP-ALG disabled, unable to confirm the firmware version at this time.
- Draytek 2820 at firmware Version 18.104.22.168 and SIP-ALG disabled.
We have been in discussion with their support and in turn their engineering so hopefully future Draytek models will be easier to have SIp-ALG switched off (i.e. we do not need to SSH into the router!)
However, to disable SIP-ALG do the following; Use Telnet via the Windows Command Prompt, or Putty to establish a command session with the router. Issue the following commands:
sys sip_alg ?
Checks if SIP ALG is enabled or not, if it is:
sys sip_alg 0
Saves changes to the router and restarts the device.
There a lot of other routers out there and we will be testing other ones with our service. But if you would like more generic VOIP advice on routers and what they do to a SIP service then have a look at http://www.voip-info.org/wiki/view/Routers+SIP+ALG.