Siemens 685 and Speedtouch 780wl

Hi everyone

Can anyone help out, I know this router has VoIP built in to it but can you still use the Siemens 685IP phone with it?

I've got it all connected up and device says registered at this end and on the server BUT no incoming phone calls and I get number not in use BUT i've turned sipgate voicemail on and that works ok so it's obviously working ok as far as sipgate at least.

I know there was some jiggery pokery in telnet to get it working with the 585 I had anyone help me out here?

Yay cracked it myself in the end

disabled the SIP ALG in the speedtouch 780 with the following command

{Administrator}[connection]=>appconfig application=SIP SIP_ALG=disabled
{Administrator}[connection]=>saveall

Then manually port forwarded ports 5060-5065 to the Siemens base and now all working

If you had a router without Voip facility I assume that you would simply plug the phone into a LAN socket on the router and let the phone do the work. Conversely why not just plug an ordinary DECT phone into the speedtouch?

I comment solely out of curiosity as the Speedtouch is available cheaply now and I am thinking of getting one to experiment with.

Posting your own solution is always worth doing as sooner or later somebody else will have the same problem!

Meldrew

No, if the router had no VoIP facility - you can't just plug a phone it.

You need either a router with a VoIP facility i.e one that can take a SIP service and provide ports like the 780WL... or a device such as an ATA that plugs in to the LAN of the router of which you then plug a phone in to.

Matt

Edited by deleted (Thu 21-Jan-10 17:58:17)

I was asuming (wrongly?) that the phone in question had a built in ATA.

Meldrew

The siemens 685IP has a built-in ATA, I had also assumed that was what the o/p was asking about, but i believe there is also a standard 685 model without the sip functionality.

edit: re-read original post. model is in fact 685IP. Irrelevant anyway as question has been answered - but for future reference and as the o/p found out first rule with sip devices is to always disable sip alg on your router.

Edited by deleted (Fri 22-Jan-10 23:07:41)

My S685IP works for both incoming and outgoing VoIP calls through a 780WL. I did not disable the SIP ALG in the 780WL. STUN is disabled for the VoIP connection on the S685IP.

Well all I can say is what did and didn't work for me, they both appeared as registered but incoming calls did not work

Simply because I got the Siemens 8 months ago and it was connected to a Speedtouch 585v6 that recently passed away (after 4 years service) and the 780 I got from ebay for £15 delivered

Cheers I had googled it beforehand and not found what I was looking for but then had another look and found the answer.

I remember having to do something similar with the 585 when I first connected it all up.

On a side note the 685IP is an awesome phone I currently have about 5 VoIP lines config'd to it along with my landline and I like the way you can name each connection so that it tells you which one is ringing

yeah its a good unit. 2 minor complaints i have with it though:

Its network interface is only 10hdx. I raised this with siemens as i thought mine was faulty but they said thats how it is.

If you hold down the call button a bit too long it will route the call over the fixed line with no warning, possibly incurring massive bills! But maybe i just havent configured mine properly. With my old spa3102 i had to prepend the number with a hash to tell it to use the fixed line, which is a better method.

Not come across that call issue before always append when I want to specify a designated line to dial out on have you got the latest firmware I see they have brought about 3 new versions out since I got mine as for the 10/100 thing I suppose if that's all it needed then putting any more in would have been pointless in Siemens eyes...

I've only got one handset i'd like to get a few more and play with the "switchboard" style features I could see this being really good for a smallish business with a few employees like a small estate agents or something like that.

I love mine

In reply to a post by mark_s_lewis:

My S685IP works for both incoming and outgoing VoIP calls through a 780WL. I did not disable the SIP ALG in the 780WL. STUN is disabled for the VoIP connection on the S685IP.

Actually, I take this back. Both incoming and outgoing calls between the S685IP and geographic numbers worked fine with my VoIP provider (Voipcheap), but calls on Gigaset.net did not have any audio in one direction. Disabling the SIP ALG on the 780WL, as described above, and forwarding TCP port 5060 and UDP for the RTP ports fixed this. I had STUN enabled with the port-forwarding approach.

What is Sip ALG, why is this a problem when using voip?

SIP Application-level Gateway. They're meant to try and fix some of the problems caused by NAT. The only reason they cause problems for VoIP is that a lot of router manufacturers still have broken implementations.

SIP ALG shouldn't really be a problem these days since most VoIP providers are now using media proxies to handle the audio. I have the SIP ALG disabled in my router (even though it's running TomatoUSB so is probably not a broken implementation) and have no problem with any of the 4 providers i use because they all use media proxies. The Gigaset 685 also supports media proxies.