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| Lihoy > Telecommunications > Exchanges > Sell GSM Exchange |
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| 2 line telephone can be auto-transfered, when you(A place) dial one line phone number to the base(B place), the base test and pick up anther line, you will hear anther dialling tone, you can dial the phone(C place) number again. Used in borderline of country or difference region to save fee! Seng Gang Co.
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