What is the Global Telecom VoIP Phone Adapter?
The Global Telecom VoIP Phone Adapter is a compact and lightweight adapter that, combined with a standard telephone and Ethernet router, creates a phone line over a Broadband connection.
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What is so special about the Global Telecom VoIP Phone Adapter?
The Global Telecom VoIP Phone Adapter not only allows you to make calls over the internet, you can take it on your travels and enjoy features such as Call Divert, voicemail indicators as well as free voicemail retrieval.
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Do I need to install any software to use my Global Telecom VoIP Phone Adapter?
No, the Global Telecom VoIP Phone Adapter is completely independent of your computer, you do not even need a computer to use it.
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Do I need to keep my ADSL or Cable Router on?
Yes, in order to make and receive phone calls, these must be connected at all times.
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Will I be able to access my voicemail, for free, using the Phone Adapter?
Yes. You can access your voicemail by calling an 0207 local rate number - this is FREE when called from the Global Telecom VoIP Phone Adapter.
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How can my Broadband usage affect call quality?
A VoIP call requires constant bandwidth over the length of a call to ensure good quality. If during a call you upload or download large amounts of data this can affect voice quality in a number of ways, including time delays, static on the line, interrupted speech and jitter. Try to avoid large data transfers while on an active call.
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What type of equipment do I need to use the Global Telecom VoIP Phone Adapter?
Any ADSL or Cable Router that is Ethernet based and has a spare Ethernet port (RJ45).
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Can I use the Global Telecom VoIP Phone Adapter with my cable modem at home?
Yes, as long as the cable modem is being used in conjunction with a cable router.
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I have an ADSL connection but am currently using a USB modem to connect my PC to the internet, can I use the Global Telecom VoIP Phone Adapter?
You will need to replace your USB modem with an ADSL router which has both USB and Ethernet ports. If you have a spare Ethernet port network card on your PC then you can just purchase an Ethernet router.
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If I have Broadband from a cable TV company, like Telewest or NTL, can I use the Phone Adapter?
If your PC is connected directly to the Cable Modem via USB or Ethernet, then you may need to purchase a Cable Router, with a minimum of 2 Ethernet ports, in order to connect both your PC and your Global Telecom VoIP Phone Adapter. Please make sure that your PC has an Ethernet port Network card to connect to your Cable Router, or you may require a USB and Ethernet based Cable Router.
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Can I use a normal NAT router with the Global Telecom VoIP Phone Adapter?
Some routers may require a firmware upgrade to be SIP compliant.
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Does the Global Telecom VoIP Phone Adapter work behind a firewall?
Our chosen Phone Adapter, the Grandstream 486 ATA, works behind most firewalls, but not those which completely restrict all traffic. If you have problems with one-way speech this could be down to misconfigured router or firewall settings. Please contact our support line for advice on Port Forwarding, or default DMZ settings. In some cases your router may require a Firmware upgrade to allow SIP traffic to be routed correctly.
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What type of Broadband connection do I require?
A Broadband connection with at least 128 kbps of bandwidth in both upstream and downstream directions. Please check with your current broadband provider if you are unsure of your current upstream and downstream capacity. The most common Broadband connection in the UK is ADSL 512K, which has a bandwidth of 512kbps downstream and 256kbps upstream. This service is usually provided at a 50:1 contention ratio.
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What codecs do Global Telecom VoIP support?
Different codecs will require different amounts of bandwidth. We currently support G711 and G729. The G729 codec requires less available bandwidth.
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There was a power failure and now my Global Telecom VoIP Phone Adapter is not working, what can I do?
If your unit lost power unexpectedly then you may need to reset it. To do this unplug the power cable, wait 5 seconds and plug it back in. The unit will re-register in 30 seconds.
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