A-Z termination
A-Z VoIP termination
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A-Z VoIP routes - TDM

Common questions that we are asked about 44Mobile.  Please study this page before contacting us with your question.

  • A-Z rates


    Assumes 8% discount
    See full rate list >>

  • Control panel

    Your control panel is where you can view your balance, CDRs and make payments.

    My 44Mobile >>

Frequently asked questions

Using the system:

Routes and rates:

Technical questions:

General questions:

Financial questions:

Using the system

How does the system work?

We provide A-Z termination through our VoIP switches in London.  We also provide you with an online control panel to manage your account.

How do I get started?

  1. Create a new 44Mobile account.
  2. Configure your VoIP equipment.
  3. Make a payment and start calling.

Do you provide CDRs?

Call records are available to view in tabulated HTML format at the online control panel and can be downloaded in Microsoft Excel format.

What are the billing steps?

The billing steps are 1/1 - per second.  Individual call calculations are rounded up to the next USD 0.0010 increment.

Routes and rates

What are your routes like?

We send all traffic to tier-1 carriers in London using TDM interconnections that we own and manage.  Those carriers provide us a reasonable blend of white and grey routes.

What if a route fails?

We have interconnections to multiple carriers.  If a call fails, our switch will often overflow it to an alternative route automatically and in real-time.  Sometimes, this re-routing needs to be set manually by our support team.  44Mobile rates closely match the wholesale market.  If, for pricing reasons, an alternative route is not available, then a price adjustment will be announced, but the route may not work until that price adjustment comes into effect.

How often do you change your rates?

44Mobile rates closely mirror the wholesale market and consequently change every few days.  Rate change notifications are sent by email and new rates are available for download in Microsoft Excel format at the online control panel.

Where are your dial codes?

Dial codes are available for download in Microsoft Excel format at the online control panel.

Technical questions

What is your IP address?

You should send calls to sip.44mobile.net or  If you use SIP, you MUST send calls to our non-standard SIP port 6060.

Can I authenticate from a dynamic IP address?

No.  Authentication is only possible from a fixed IP address.

How do I add or remove an IP address on my account?

You should send an email to our support team detailing your requirements.

Can I have multiple fixed IP addresses on my account?


Can I use a shared fixed IP address?

If you use a hosted softswitch that does not give you a unique public IP address, then we will need to add a tech. prefix to your account.  You should send an email to our support team detailing your requirements.  Bear in mind that no further per-call authentication is provided, so all calls from your IP address and with your tech. prefix will be assigned to your account.

What dialling pattern should I use?

When created, 44Mobile accounts will accept calls in either of these formats:

  • Country + Number (E.164)
  • 00 + Country + Number

Please contact our support team if you would like a different dialling format.

Should I use H.323 or SIP?

We support both call signalling protocols, but we recommend that you use H.323, because it is more reliable.  If you use H.323, you must enable Fast Start and H.245 tunnelling.  If you use SIP and you are authentication by fixed IP address, you MUST send calls to our non-standard SIP port 6060.

What codecs do you support?

We support G.729 and G.711.

Will DTMF work?

Yes.  For H.323, you need to enable H.245 tunnelling and send DTMF information in an H.245 UserInputIndication message.  For SIP, you need to send the information in SIP INFO messages.

Will fax work?

Our service is primarily voice, but fax may work to some destinations.  You will need to use the G.711 codec for youf fax calls.

Do you support Asterisk?

We support Asterisk using SIP, but not IAX.  You should disable re-invite on the trunk group, because we do not support that feature and it is not possible to renegotiate the media path once it has been established.

Can you configure my VoIP switch for me?

No; we do not offer that service.

General questions

Who are you?

We are Westbay Engineers Ltd., and 44Mobile is one of our products.  We are based in the UK and have been providing telecommunications software and services since 1989.

How can I contact you?

Please see our contact page.

What support do you provide?

Support is limited to the investigation of route problems.  Support is provided by email only.

Do you have a reseller system?

No.  44Mobile is a direct sale product.  If you wish to resell, then you have two options:

  • Use 44Mobile in conjunction with DUAL Softswitch, our hosted VoIP softswitch product.  This is a powerful switching and online billing solution that includes Least Cost Routing and a call shop billing system.
  • Use our DUAL Talk VoIP product.   This includes a reseller system that allows you to create and manage sub-account.

Financial questions

What is the set up cost?

There are no set up costs for new accounts.

When should I pay you?

Our service is prepay.  Your account must be in credit before calling is allowed.   When your balance reaches zero, the calling will be disabled until we process your next payment.

How can I pay you?

We accept wire transfers and Western Union Quick Pay and we do not charge for those payment methods.  Subject to approval, we accept online payments with credit cards and PayPal (verified) in Pounds Sterling with a 2% transaction fee.  We can also accept online payments in Euro and US Dollars, but there is a 6% transaction fee for these payment methods.

Is there a minimum term?


I have lots of traffic.  Can I get lower rates?

Yes.  We offer discounts for larger prepayments.  Please see our rates page for more information.

Can I have per-second billing?

Yes.  All accounts have per second (1/1) billing.

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Last modified: 20 January 2021

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