A CDE Definition
virtual phone number
An additional phone number assigned to an existing phone line in order to save a caller long distance fees. For example, a virtual number with a Boston area code can be assigned to a phone line in Phoenix or to a phone line in most cities in the world. The Boston caller pays no long distance charges and thinks the party being called is local.
Virtual phone numbers allow call centers to operate 24 hours a day and advertise local phone numbers to each global market they pursue. Any fees associated with virtual numbers are paid to the telephone carrier or VoIP provider by the subscriber of the phone lines. See SIP provider.
An organization that provides voice over IP (VoIP) service and enables calling from SIP phones to plain-old-telephone (POTS) lines and vice versa. SIP is the universal protocol used for Internet telephony, and there are more than a hundred SIP providers worldwide that provide the POTS/SIP conversion.
Inbound - SIP Origination/SIP Trunking
SIP origination allows a POTS telephone number to be dialed and answered by a SIP phone. SIP providers have thousands of local phone numbers in local area codes that can be assigned to their subscribers, and subscribers can allow their customers to phone them toll free from different parts of the country. Family and friends of subscribers can also take advantage of the local phone number. In addition, when switching service from a landline to a VoIP line, the landline number can often be ported to the SIP line.
Outbound - SIP Termination
SIP termination lets subscribers call cellphones and landlines from their SIP phones. The rates vary depending on country and provider. See SIP, SIP trunking and VoIP.
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