Asterisk Vs Cisco – Avaya VOIP Telephone SystemsVoIP makes use of SIP (Session Initiation Protocol), peer-to-peer system that allows computers to communicate with each other without having calls routed through some central station. Therefore, calling from SIP enabled phone to another cuts call charges drastically.
VoIP or Voice Over IP, the latest in wireless communication works by taking the phone call, changing from analog to digital signals & transmitting these signals over an IP network or broadband & at last terminating it on a PSTN. Call charges are greatly reduced using this system. The advantage is that application emulating a phone can be loaded on your laptop computer thereby enabling you to access its services even while you travel.
Cisco has telephony solutions that are network based & run on a router. They are scalable & work well in multi-user environments in multiple locations. The UC500 suite is a bundle of services like router, switches, security, telephony & wireless functionality in a single gizmo. This greatly reduces costs for a company which is planning on these services. The Cisco CallManager Express makes use of SIP to connect rings through the Web & also has the features of UC 500 making it more viable for medium scale businesses. Additional features are paging, intercom, ICMP & class of restrictions on a user's calls.
The Asterisk Technique comes with an Asterisk server which manages things like teleconferencing, voice mails, queues & hold music. You can learn about asterisk support technique via http://asteriskneeds.com/index.php/asterisk-support.html. The hard phone is a digital phone that has an Ethernet jack to communicate with the server using the SIP protocol. technique.