By Business Needs
Expand current phone system/ Increase the number of users
As your business grows, you may also need to grow and expand your current phone system. Proprietary systems are easy to outgrow and adding more phone lines or extensions often requires expensive hardware modules. In some cases, you may need an entirely new phone system. Not so with an IP PBX system. Adding additional users to an IP-PBX is as simple as adding an additional phone. You can easily add users and applications to your network without requiring addition or replacement of service.
You would also be able to protect existing investment on a legacy PABX system by leveraging on the extended capabilities of VoIP and IP-PBX system. The existing system can be expanded easily with additional trunks and extensions. Remote extensions can be supported easily and interconnected with remote PABX and IP-PBX for free extension-to-extension calls to remote offices and locations.
With this integrated system, businesses would be able to make and receive calls using trunks from remote offices; support VoIP provider trunks for low cost international calls; support DID numbers without having to subscribe to ISDN; receive calls using Virtual Overseas numbers and add Auto-Attendant and Call Queues capabilities
