Call Back
Call-Back is when the initiator of a call immediately calls back for the second time as a response.
SoundPoint IP 321/331 is a SIP phone with 2-line support, which has excellent quality of sound and the wide range of IP telephony features. SoundPoint IP 321 has one 10/100 Ethernet port (331 model has two ports), through which it can be used in areas such as lobbies, hallways, resting rooms. You can also mount this device on the wall.
ZamZam Telecom
International VoIP Wholesale Provider,
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PC to Phone, Phone To PC, Phone To Phone, Termination
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