| IP PBX |
Traditional PBX |
| Number of Internal lines can be extended on demand |
Internal lines are limited to available physical ports, cannot be increased without up-gradation of software and hardware |
| No cabling for extension |
Needs cabling for each extension |
| External lines can be increased as required. Each dedicated PSTN phone number will cost only a fraction of a traditional PSTN number |
External lines are limited to the physical ports. If an increase, system needs to be changed. Not cost effective |
| There is no need to invest in individual PBX system for each branch offices, all offices can use central hosted PBX system |
Each branch office requires a self-regulating PBX system |
| Phone calls between branch offices, either local or overseas will be free |
Calls to elsewhere from local PBX system will not be free |
List of IP Centrex features
- Automatic Line / Direct Connect (“Hotline”)
- Call Forwarding on Busy
- Call Forwarding on Don’t Answer
- Call Forwarding to Multiple Simultaneous Extensions
- Call Park
- Call Return
- Call Transfer
- Call Waiting
- Caller ID
- Caller ID on Call Waiting
- Consultation Hold
- Distinctive Ringing
- Intercom Dialing
- Hunt Groups
- Message Waiting Audible
- Message Waiting Visual
- Multiple Call Appearances
- Music-On-Hold
- Station Message Detail Recording (SMDR)
- Three-Way Conferencing (Three-way calling)
- Anonymous Call Rejection *
- Call Restrictions / Station Restrictions
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Some of the features can be implemented with expensive digital PBX system (requires further investment) |