What are Trunk Lines ?
Posted On Sunday, February 10, 2008 at at 11:39 PM by Murali SrinivasanTrunk lines are the phone lines coming into the PABX from the telephone provider.These incoming lines can be analog, T1, E1, ISDN or PRI and often carry multiple channels each capable of carrying its own phone conversation.These lines are provided to the respective cards of the PABX.The lines coming out from the PABX are known as EXTENSIONS.Trunk lines can be accessed from the extensions using trunk access codes provided by the PABX.
E1
E1 is the European format for digital transmission.E1 carries signals at 2 Mbps - 32 channels at 64Kbps (32*64 = 2Mbps), with 2 channels reserved for signaling and controlling.
E1 is the European format for digital transmission.E1 carries signals at 2 Mbps - 32 channels at 64Kbps (32*64 = 2Mbps), with 2 channels reserved for signaling and controlling.
T1
T1 is the North American standard.A phone connection supporting data rates of 1.544Mbits per second.A T1 line actually consists of 24 individual channels, each of which supports 64Kbits per second. Each 64Kbit/second channel can be configured to carry voice or data traffic.So T1 carries signals at 1.544 Mbps (24*64 = 1.54Mb). T1 lines are mostly used to connect internet.T1 lines are sometimes referred to as DS1 lines.
Good Man...
I like to know more about mobile communication. can u add a brief about it.
sure da...tnx