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VOIP Solutions

Callcentric reviews

• SIP, fax to email, +CNAM, outbound CID, advanced rules, no simultaneous ring
  
• $3/mo DID
  
• call forwarding, 0.02, 0.15
  
• NY data center, codec: G729
  

Skype

• proprietary client, Skype-Asterisk connector, outbound CID
  
• $6/mo DID, $3/mo unl US/Can outbound
  
• call forwarding, 0.02, 0.30
  
• P2P routing, codec: SILK wideband
  

Localphone

• SIP, local direct dial, calling card, +CID, -CNAM
  
• $1/mo incoming number
  
• call forwarding, 0.01, 0.14
  
• Amsterdam data center, codec: G729
  

IPComms

• SIP
  
• free DID or $10/mo for 2 lines
  
• call forwarding, 0.02
  
• 18 US data centers , codec: G729
  

truphone

• proprietary client, callback, call-thru, global SIM
  
• codec: AMR-NB (3GPP standard)
  
• rates: 0.05, 0.40 (cheaper with $4/mo sub)
  

Google Voice - simultaneous ring

• Must disable voicemail, increase ring count, or call forward to GV on target phones for three situations: busy, no answer, unreachable
  
• GV has loop detection (GV->mobile->conditional call forward->GV), supporting both calls to GV and calls directly to device with CF to GV voicemail
  
• For some mobile carriers, GV detects "unreachable subscriber" (phone turned off) message that is played when voicemail and CF is not configured on the phone (e.g. some prepaid accounts)
  
• If a target mobile is roaming on an international carrier and is temporarily unreachable, GV may not detect the non-USA "unreachable subscriber" message, causing it to bypass GV voicemail. Workaround: forward the target mobile directly to GV voicemail, disabling direct inbound roaming calls.
  
• Use web UI or calling card dialer app for outbound calls with GV number
  

Notes

• Blackberry calling card dialer
  
• T-Mobile 3G: 900/1700/2100
  
• ATT 3G: 850/1900
  
• International 3G: 1700/2100