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where to buy boxes ce calls and other communications services. prosperous and English called callback callback card "basic introduction. general use toll-free reservation access number (provided by the operator). hear" tick "sound, or other voice prompts (about 1 to 10 seconds), the system will collect your phone number, hang up immediately; approximately 1-10 seconds, you will receive your phone call the front desk; answer a call; enter you want to call other numbers (area code + format is generally the other long-distance number, mobile phone number plus the former does not add "0" in accordance with a different card) and press the "#" key to end, waiting for the other to answer (or fail to turn the wrong number, press "*" key to re-enter); hook the called party answers, the two sides can talk. Suitable for mobile / Unicom / landline phone / PHS as long as the phone can be used free of charge. Prosperous and back card can be used VOIP carriers nationwide system features:.. A, using Netcom, Telecom, Railway multi-line room, ensuring interoperability line B,