With the rapid development of computer network, the data telecommunication based on Ethernet interface appears everywhere, which makes IP transmitting equipment become more and more with its price cheaper and cheaper.

Therefore, how to utilize computer IP network to implement telephone network linking or perfect and improve the current telephone network overlay has become a popular topic, among which IP telephone is the right representative (example). But in order to transmit the voice through IP net, the IP telephone has made a deep compression on the voice and so its voice quality needs a further improvement.

Spectrum communications offers you the F5-13xx can transmit 1~8 E1 channel over the IP networks. The device supports framed and unframed E1 channel, and support all of the traditional E1 and IP services, such as voice, data, fax, signaling and the other all kinds of communication service. F5-13xx is widely used with WLAN to transmit E1 signals.