SIP VoIP Gateway
This is a device allowing a user to make VoIP calls using session initiation protocol (SIP). SIP is a telecommunication technology developed as a fast, easy standard for delivering IP-based data, voice, and video communications.
In telecommunications the automatic call-back is a computer telephone function which allows the user by the engaged addressee’s line or in the other case of the subscriber’s inaccessibility indicating the system to save the number of the called subscriber and make the call when the line will be available or when the called number is not engaged.
H.K.Houyuan Technology Co., Limited
voip, ip pbx,voip pbx,China voip manufacturer
H.K.Houyuan Technology Co., Limited was founded in 2009 with headquarter located in Shenzhen and branch office in HK ,suzhou. There are several departments such as VolP,RFID, consumer electronics , SMT produ
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