PSTN's traditional multi-party teleconferencing system is the most widely used teleconferencing solution in domestic enterprises. It mainly adopts the multi-party calling platform provided by the teleconferencing company and purchases its own multi-party conference hardware equipment.
Their main differences are:
Conference service company platform
Company self-purchasing hardware conference platform
No need to buy multi-party hardware devices, only occupy one outside line
Need to purchase multiple hardware devices, may occupy multiple external lines
You may have to make an appointment in advance the meeting. Call stability is not good for self-purchasing equipment
Self-owned equipment, ready to meet, more free time
To charge a monthly rent (annual rent), or to add an audio fee
Calling standard telecom charges
The service company has a risk of bankruptcy and has a certain risk of rent loss.
No uncertain risks