Is your infrastructure suitable for implementing SIP?
The number of SIP trunking installations has grown to reach 2 million just recently, finally matching the number of ISDN channels installed. As the trend continues, and given that BT plan to mothball ISDN lines in less than 10 years, the balance will begin to tip making it inevitable that SIP will become the new ISDN.
One of the first steps your organisation needs to take to make the transition to SIP, is to establish if your existing infrastructure is suitable for SIP technology. There are various considerations to make and here you can find the answer as to whether you are ready for the change and what planning is required to facilitate this: