The blacklist represents itself a list or register of entities which are denied privileges, service, mobility, access and admission due to these or other reasons. This function blocks all connections from the subscribers who are in the list.
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