Get connected on any device

The basics — the same on every device

VoIP uses the SIP protocol, and all devices need just a couple of things to get going — it's the same everywhere. When you get an account from us you'll have a username, a password and a SIP server address. Put those three things into your device config and that's it. There's one optional setting, the codec (how much bandwidth a call uses); you normally wouldn't change it, but in a poor-connectivity area you can pick a lower-bandwidth codec.

IP Desk Phones

On all desk IP phones the config is the same: enter your User ID, Password and SIP Proxy, which in every case is sip.transcom.net. Your free account includes two SIP lines, so you can register a handset in two places — add the second line yourself in My Account. Need more? The 25-line account covers a full office.

Mobile Phones

Some mobiles have a SIP client built in. The configuration is the same — user ID, password and SIP proxy sip.transcom.net. On slow networks you may want to change the codec; we support many, so just ask and we'll recommend the best one. If your phone has no built-in SIP client, download any SIP client or softphone — there are hundreds, and many are free.

Laptops, Mac & PC

You can use our VoIP service on any laptop, Mac or PC. Search for a free softphone and download the app, add your User ID, Password and SIP Proxy, and use your mic and speakers to talk. You can add a DID number to any device, including a computer.

The easy way on Windows — our pre-configured softphone

You don’t have to configure anything by hand. Every free account includes a ready-to-use MicroSIP softphone for Windows, already set up for your line. Sign in to My Account, open My VoIP → Lines and click 📱 Windows phone next to the line you want. You’ll get a zip containing MicroSIP and a config file with your username, password and all the settings below already filled in.

Unzip it anywhere — your Desktop is fine — and run MicroSIP.exe. It registers on its own; there’s nothing to type in. It’s the portable edition, so there’s no installer and nothing written to your system. Got two lines? Download each one into its own folder and run them side by side.

Setting MicroSIP up by hand

Prefer to do it yourself, or already have MicroSIP installed? These are the exact settings we ship — they’re a known-good, tested configuration for our network. In MicroSIP go to Menu → Add account for the first table, and Menu → Settings for the second.

Caller ID is a must for national rates

Do not hide your Caller ID if you want our national rates. Those rates — our cheapest — are only charged when you present a local Caller ID from the same country you’re dialling: a DID you rent from us, or a number you own and have validated. With Caller ID hidden or unset, national rates don’t apply and the call is billed at the standard rate instead.

So leave Hide Caller ID disabled in your softphone or handset, and set your outbound Caller ID on the line in My Account (My VoIP → Lines → edit the line). The one exception is the US & Canada, which need no local Caller ID. Not sure it’s working? Dial 1-555-555-0911 and it’ll read your Caller ID back to you. See the national rates for the countries covered.

Cheat sheet

Handy reference for account settings and service codes.

Do not include any “+” signs when dialling — they are shown above for reference only.