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tpcall
tpcall
China
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tpcall
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China
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A-Z Termination
Audio Codec’s: G.729, G.711
voipswitch
Billing system of own development
H.K.Houyuan Technology Co., Limited
Houyuan Technology (HK) Limited
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Call Back
Call-Back is when the initiator of a call immediately calls back for the second time as a response.
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