Caller ID
Caller ID support among VoIP providers
varies, although the majority of VoIP providers now offer full
Caller ID with name on outgoing calls. When calling a traditional
PSTN number from some VoIP providers, Caller ID is not supported.
In a few cases, VoIP providers
may allow a caller to spoof the Caller ID information, making
it appear as though they are calling from a different number.
Business grade VoIP equipment and software often makes it easy
to modify caller ID information. Although this can provide many
businesses great flexibility, it is also open to abuse.