![]() However, if this coworker does not answer his cell phone, this call can be forwarded to a voicemail. If a CTO calls any coworker and the call is not answered, because the person was at the lobby receiving a customer, it will be routed to this coworker's cellular phone, which happens to have a Session Initiation Protocol ( SIP) client registered to the PBX using the wireless LAN of the building. They want to keep their co-workers connected, reachable, and available at all times. Nowadays, enterprises are not merely looking for telephonic solutions (PBX) anymore they are looking for integrated, complete, and out-of-the box solutions that allow them be as productive as possible. The advantages of open source licensing allowed this project to develop features unachievable using traditional telephony devices, at very competitive prices. ![]() It was in 1999 when Mark Spencer began a very important project: Asterisk PBX. The world is getting smaller, bandwidth is growing, and protocols are getting increasingly standardised, open, and stable. There is a revolution going on in the telecommunications field these days. Introduction to Elastix Unified Communications System
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