Asterisk, Avaya, Call Manager, CallManager, CCM, CDMA, Cisco CallManager, Cisco CallManager 6.1, Cisco IP phone, Cisco VoIP System, Collaboration, DSL, Facebook, Fax servers, Full Duplex, H.323, IP PBX, IP phones, IP telephony, ISDN, ISDN Configuration, ISP, Leased line, Leased line services, Nortel, Nortel CS 1000, Nortel PBX, Optical Networking, P2P, Packet Loss, PBX, Polycom, QoS, SIP, Skype, Social networking, Social networks, Softphone, Telecom, Telecom Careers, Telecom certifications, Telecommunications, twitter, Unified Communications, Video conferencing, Video streaming, VoIP hardware, VoIP performance, VoIP security, Webcam VIEW ALL TAGS
I am trying to commission a network of Cisco Call Manager Express systems with (mainly) Cisco 521 phones connected to a private IP network for a corporate client. Prior to the "proper" solution being introduced a temporary solution using Asterisk with Grandstream GX-2000 phones was installed to...
voIP/telecom-how good is this system? How long has it been around? What are the pros/cons?