PBX

• PBX Stands for Private Branch Exchange.
• Works as a calling router.
• PBX is a private telephone network with in a company or organisation.
• PBX is used for communication internally or externally.

PBX Features:

• Use of more than one telephone line in an organization, and management of outgoing and incoming calls. 
• Splitting of one single phone line into several internal lines
• These internal line as extension number which contains three or four-digit numbers.
• Allow free phone communication within the organization. 
• Ensure good interface with customers through features like call recording, voice mail.
• Auto answering the call with in a network through phone speaker or for group announcement.

Some Terms used in PBX:

• PSTN(Public Switched Telephone Network):

Is the region where the communication between to users from other organisation or individual person.

• Auto-Attendant:

If a user calls PBX is set for the auto attendant call for one phone or it is sent to Voice Mail or IVR services.

• Voicemail:

When ever you call a customer service you hear a computer voice, these comes under the voicemail.

Types of PBX:

Traditional PBX:

• Simple Hardware box.
• Connects the multiple phone, of analog and digital, voicemail and IP phones.
• Features are call forwarding, call hold and intimation of busy line.

IP PBX:

• Uses Internet service for communication.
• Calls are transferred using the IP address.
• Internal phone are directly answered by pressing a button.
• External calls forwarded using the Voice Over IP.

Host PBX:

• Host PBX is nothing but PBX is not situated in the internal network.
• It works as an cloud network, where organisation check after the operation for paying some monthly charges.
• By the host PBX, cost and work is reduced.
• Using host PBX we can connect to different branches of company or organisation with in a region as internal extension.