VoIP based IP PBX software has a host of features and one of them is the BLF (busy lamp field).
The function of the BLF is to show if an extension is busy or if it is available.
Even softphones have a similar setup one can view on the monitor.
In essence it is simple.
It can be particularly helpful in call centers or enterprises in transferring calls to someone who is free to attend.
It is also helpful in monitoring activities.
QuickBooks POS Error 121 also known as Permission Denied Error generally occurs if someone tries to sign-in to their QuickBooks Point of Sale Software other than the 'System administrator'.
Python is one of the most important programming languages in today.
Not only software developers, but also network engineers, system managers, scientists are using python programming language.
To do this, you need a Python programming courses.
You can practice each python programming lessons with these code examples.
You can also learn conditions like elif in python.
The Python training on IPCisco.com will cover all the basic lessons of this programming language.