What is your IP address?
You should send calls to sip.44mobile.net or 188.8.131.52. 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
You should send an email to our support team
detailing your requirements.
Can I have multiple fixed IP addresses on my
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.