Method and apparatus for enabling international toll free...

Method and apparatus for enhanced call routing in a...

Method and apparatus for enhancing the operating capabilities of

Method and apparatus for establishing an ISDN call between parti

Method and apparatus for establishing interlata communication

Method and apparatus for even distribution of signaling link...

Method and apparatus for executing communication in...

Method and apparatus for extending PBX features via the...

Method and apparatus for facilitating communication across multi

Method and apparatus for facilitating remote communications acce

Method and apparatus for handling calls requiring the...

Method and apparatus for handling subscription and administrativ

Method and apparatus for implementing a plurality of...

Method and apparatus for implementing an extensible range of...

Method and apparatus for implementing services in telephone netw

Method and apparatus for integrated multimedia call control

Method and apparatus for IP network call delivery

Method and apparatus for maintaining uninterrupted telecommunica

Method and apparatus for measuring loads in a common channel sig

Method and apparatus for network communication