VOIP Gateway ?

lzbones

I use SIP (mostly) for outbound calls but would also like to have the option of using my PSTN phone line, I currently use a zoom VOIP router which lets me switch to PSTN calls with #. But now I want to extend to using more than one IP phone (which support multiple accounts). I wonder has anybody come across a device which provides outdials to PSTN that I can 'register' all my phones to.

For example Phone 1 is a GXP 2000, line 1 is registered to freespeech.ie, line 2 is registered to the 'gateway device'. If I want to dial out to PSTN then I just select line 2. Similarly for Phone number 2, 3 etc...

I know I could do this with an IP PBX but was wondering if there was something simpler..

I suppose an option would be to use some sort of SIP registrar and register an AT with an FXO port then dial from line 2 on the GXP2000 to the ATA then break out to PSTN...but this sounds a little complex..

any ideas ?

lzbones

I found this, an FXO-FXS converter - should do the trick

http://www.pcphoneline.com/pcphoneline/fxsfxo.htm

Would sipura-3000 also work ?

Any other ideas ?

aaronc

You won't be able to use a Sipura3000 or any other ATA like that with your IP Phone because none of them have a SIP Registrar.

I had a quick look on voipsupply.com and below is a product I think would do the trick for you. If you look at rest of the VoIP gateways listed on voipsupply.com you'll find more options.

http://www.voipsupply.com/product_info.php?products_id=1633

That AudioCodes gateway is essentially a PBX though and I think you will struggle to find a way to share your PSTN line with your IP phone without using more of a PBX type device rather than an ATA type device, the lines between are getting a bit blurry these days.

However if it was me doing the same thing I would look at running Asterisk. For the same price as the above gateway you could get a cheap second hand PC and an FXO card and do everything you'll ever need to do and more. The downside is you'll spend a fair bit of time learning the in's and out's of Asterisk and Linux. There are some products arond now that help take the pain out if it a bit http://www.trixbox.org/ for example but you'll still end up needing to spend a fair bit of time with it.

hth.

Aaron

lzbones

Yes I understand about the SIP registrar part. I thought I could set one of the 'quick dial' buttons on the phone to use IP to IP dialing to connect directly to the ATA (which is not registered to any SIP service), the converter would then automatically answer the ATA and give me a dial tone to make an outbound call.

Like wise the incoming calls would be answered by the converted the autmatically 'forwarded' to vi IP to IP to one of the phones (so only one phone gets incoming but they can all make outgoing).

aaronc

Yes that would be a clever way to do it. I seem to recall the Grandstream HandyTone devices had an option to auto-forward calls, I think it was called intercom or hot phone or something, as soon as you pickup the receiver or in this case send a call to it it just auto dialled somewhere else. The Sipura's have a lot more advanced firmware than the HandyTones so they probably have something similar. It would be worth checking out the User Guide for the Sipura3000.

Aaron