A significant percentage of modern phone handsets now have built-in VoIP capability whereas older handsets used with traditional PBX systems are less likely to offer compatibility and may require replacement. Much depends upon the nature of your business. If your team are primarily based remotely, there may be no requirement for a centralised office system and everyone can work from smartphones.
It is entirely possible to use vietnam whatsapp number data VoIP with existing hardware. Whilst you cannot simply take an analogue phone and connect it to a broadband router, an ATA (Analogue Telephone Adapter) can be introduced which utilises CODECs to convert analogue voice information into the digital packets required by VoIP. The ATA also generates the standard line voltage required to operate (and ring) a traditional handset.
Clearly, the functionality available on an analogue phone is a subset of that available on modern digital handsets and some cost-benefit analysis will be required in determining whether the investment in new digital hardware may deliver sufficient business benefit to justify the capital expenditure.
It is worth considering that modern IP phones may also include a decent screen which can support video conferencing; together with programmable feature keys. Since VoIP offers a plethora of additional functionality including call blocking and IP fax, in addition to rather more advanced digital versions of PBX functionality including call forwarding, voicemail and caller ID, fast key access to these functions can be provided by a modern, configurable, handset in a way that simply isn’t possible with older equipment connected via an ATA.