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Phone services. IP-telephony - it is very easy. Dont be afraid of it. You are not adhered to a telephone line and to the certain address. Simply connect your IP-phone to the Internet where you are. And then Immediately you can calling and accept calls.
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Prague telephone number registration
Cards/To buy With Greg I-Call card you can have access to cheap international callc from any usual or mobile phone... There are many softphones with that you can use GregPhone network, FireFly or SJPhone for example... IP-adapter, or IP-telephone is a hardware devices to use all possibilities of the GrerPhone network...
Try free-of –charge
With Greg I-Call card you can have access to cheap international calls from any proper phone or taxofone...
  There are many softphones with that you can use GregPhone network, FireFly or SJPhone for example...
  IP-adapter, or IP-telephone is a hardware devices to use all possibilities of the GregPhone network...
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contacts, e-mail
With Greg I-Call card you can have access to cheap international callc from any usual or mobile phone... There are many softphones with that you can use GregPhone network, FireFly or SJPhone for example... IP-adapter, or IP-telephone is a hardware devices to use all possibilities of the GrerPhone network...

Try GregPhone free-of-charge...

You can use any IP-telephone, IP-adapter or softphone (Firefly like example) SIP protocol supported.
For test call is enough to setup device with this settings:

- SIP server: ask by phone (257221704)
- Account: 226208998
- Password: gregphone

Detailed setup instruction for FireFly program

All outgoing calls will be directed to Greg Computers office, incoming calls not be received. If you would like connection quality, you can get your own telephone number in the Greg Computers office. In the settings of your telephone only login and password will be changed.

If you have any problem with calling, check up firewall settings or turn it off.

FireFly users recommendation:
After downloading and unzipping software package you will see three files – istallation file firefly_thirdparty.exe, cesky.xml and g729.dll. After the program istallation copy file g729.dll to the c:/Program Files/Firefly folder .
After the program restart in menu Options-Networks-Network 1 we recommend you turn on GSM and G729 codecs, and turn off all another.