they used to exchange data in a wireless system. also, so that data will be group and connect each other in one communication
how we use Public switched telephone networks to carry all our digital contents
The abbreviation CLEC stands for "competitive local exchange carrier". This is a telephone company that competes with pre-existing telephone companies by providing its own networks.
VPN
It is a device which used for taking and reasoning in between two persons is called cellular telephone networks
VoIP replace your telephone networks but your existing telephone numbers can be use again to maintain your contacts.
The telephone call has been transmitted over data networks/internet.
VoIP works on telephone or cellphone connected to the internet and computer. It uses internet networks and not telephone networks.
Show the formation of a T1 frame and an E1 frame used in telephone networks
VoIP is Voice Over Internet Protocol a telephone system that uses internet networks instead of telephone networks.
http://wiki.answers.com/Q/How_is_the_data_and_imformation_transimited_over_public_telephone_network,public switched telephone networks and intergrated service digital networks.
0121 serves the Birmingham, England area for telephone networks.
networks