This is why ENUM was invented.
This is roughly how it works:
1. Convert the phone number to a DNS query.
2. The result is the preferred way to connect to the user.
And DNS can change quite fast so it's dynamic:)
EC500 on Avaya phones also has some interesting features.
More details:
http://en.wikipedia.org/wiki/ENUM
This is why ENUM was invented. This is roughly how it works: 1. Convert the phone number to a DNS query. 2. The result is the preferred way to connect to the user. And DNS can change quite fast so it's dynamic :)
EC500 on Avaya phones also has some interesting features.
More details:
http://en.wikipedia.org/wiki/ENUM
Anyone knows a python can kill a cat.
I wrote an article about the solution to many logins and passwords...