The Betamax group of VoIP providers (VoipBuster and others) is made up of 10 apparently different companies.  VoIPBuster, VoIPCheap.co.uk, Netappel, SIP Discount, Voipstunt, Sparvoip, Internetcalls, Voipdiscount, Poivy and Voipcheap.com are all part of the same group. All possible SIP settings are listed below as well as supported Codecs. For a price comparison of the Betamax services, listed below, go to backsla.sh/betamax (page loads slowly). Please remember that the providers below change there pricing constantly, and only the Betamax providers listed below support SIP (phone adapter) calling. BETAMAX PHONE ADAPTER CONFIGURATION LowrateVoIP User Your username Password Your password Sip-server sip.lowratevoip.com Domain * (Optional) lowratevoip.com STUN-server ** (Optional) stun.lowratevoip.com Freecall User Your username Password Your password Sip-server sip.voiparound.com Domain * (Optional) freecall.com STUN-server ** (Optional) stun.voiparound.com Voipbuster User Your username Password Your password Sip-server sip.voipbuster.com Alternative sip-server sip1.voipbuster.com Domain * (Optional) voipbuster.com STUN-server ** (Optional) stun.voipbuster.com Sipdiscount User Your username Password Your password Sip-server sip.sipdiscount.com Alternative sip-server sip1.sipdiscount.com Domain * (Optional) sipdiscount.com STUN-server ** (Optional) stun.sipdiscount.com Internetcalls User Your username Password Your password Sip-server sip.internetcalls.com Domain * (Optional) internetcalls.com STUN-server ** (Optional) stun.internetcalls.com Voipstunt User Your username Password Your password Sip-server sip.voipstunt.com Domain * (Optional) voipstunt.com STUN-server ** (Optional) stun.voipstunt.com Sparvoip User Your username Password Your password Sip-server sip.sparvoip.de Domain * (Optional) sparvoip.de STUN-server ** (Optional) stun.sparvoip.de Poivy User Your username Password Your password Sip-server sip.poivy.com Domain * (Optional) poivy.com STUN-server ** (Optional) stun.poivy.com Voipcheap User Your username Password Your password Sip-server sip.voipcheap.com Domain * (Optional) voipcheap.com STUN-server ** (Optional) stun.voipcheap.com Netappel User Your username Password Your password Sip-server sip.netappel.fr Domain * (Optional) netappel.fr STUN-server ** (Optional) stun.netappel.fr Voipdiscount User Your username Password Your password Sip-server sip.voipdiscount.com Domain * (Optional) voipdiscount.com STUN-server ** (Optional) stun.voipdiscount.com VoipbusterPro User Your username Password Your password Sip-server sip.voipbusterpro.com Domain * (Optional) voipbusterpro.com STUN-server ** (Optional) stun.voipbusterpro.com Webcalldirect User Your username Password Your password Sip-server sip.webcalldirect.com Domain * (Optional) webcalldirect.com STUN-server ** (Optional) stun.webcalldirect.com Voipcheap UK User Your username Password Your password Sip-server sip.voipcheap.co.uk Domain * (Optional) voipcheap.co.uk STUN-server ** (Optional) stun.voipcheap.co.uk SMSDiscount User Your username Password Your password Sip-server sip.smsdiscount.com Domain * (Optional) smsdiscount.com STUN-server ** (Optional) stun.smsdiscount.com * = Optional = normally not required ** = STUN Server may sometimes be required if you are operating from behind a router All providers support the following VoIP codecs: G.711a,G.726,G729,G723 (possibly soon iLBC,GSM) - should  you encounter problems set to the default G711a OPTIONAL: On the SIP page (advanced mode): STUN Server: stun.fwdnet.net:3478 (you can use any STUN server, they are not provider specific.) DIALING: You must enter 00 before any phone number you call. For example, if you are calling a new york number 1-631-000-0000, you would dial, 0016310000000 BETAMAX OTHER DETAILS Freecall.com Credit Expiry: 90 Days FreeDays: 300min/week/90 days Software: Yes SIP: Yes (sip.voiparound.com) WebCallDirect.com Credit Expiry: Never FreeDays: 300min/week/90 days Software: Yes WebBased Calling: Yes SIP: Yes (sip.webcalldirect.com) VoipStunt.com Credit Expiry: Never FreeDays: 300min/week/120 days Software: Yes SIP: Yes (sip.VoipStunt.com) IntenetCalls.com Credit Expiry: Never FreeDays: 300min/week/120 days Software: Yes SIP: YES (sip.internetcalls.com) VoipDiscount.com Credit Expiry: Never FreeDays: 300min/week/120 days Software: Yes SIP: Yes (sip.voipdiscount.com) LowRateVoip.com Credit Expiry: Never FreeDays: 200min/week/30 days Software: Yes SIP: Yes (sip.lowratevoip.com, reports that SIP Calls charged 3 euro/cents higher than advertised) Nettapel.fr Credit Expiry: Never Free Days: 300min/week/120days Software: Yes SIP: Yes (sip.nettapel.fr) VoipCheap.com Credit Expiry: Never FreeDays: 300min/week/90 days Software: Yes SIP: Yes (sip.VoipCheap.com) Poivy.com Credit Expiry: Never FreeDays: 300min/week/120days Software: Yes SIP: Yes (sip.poivy.com) SipDiscount.com Credit Expiry: Never FreeDays: 300min/week/120days Software: NO SIP: YES (sip.sipdiscount.com) SMSDiscount.com Credit Expiry: Never FreeDays:300min/week/120days Software: Yes SIP: No WebBased SMS: Yes SparVoip.de Credit Expiry: Never FreeDays:300min/week/120days Software: Yes SIP: Yes (sip.sparvoip.com/sip.sparvoip.de) VoipBuster.com Credit Expiry: Never FreeDays:300min/week/120days Software: Yes Sip: Yes (sip.voipbuster.com) Furum: https://forum.voipbuster.com/ VoipBusterPro.com Credit Expiry: Never (10 Euro gets you the FreeDays Package and 5 Euro Credit) FreeDays: 300min/week/365 days (3.9 euro cent connection fee applies to all calls) Software: Yes SIP: Yes (sip.voipbusterpro.com) (This was their offer to compete with Skype) Voipcheap.co.uk Credit Expiry: Never FreeDays: 300min/week/120 days Software: Yes SIP: Yes (sip.voipcheap.co.uk)