E1/T1
A European format for digital transmission. E1 supports signals at 2 Mbps (32 channels at 64Kbps, with 2 channels reserved for signaling and controlling), versus the T1, which carries signals at 1.544 Mbps (24 channels at 64Kbps).
The function allows the user by entering a 5-digit number to receive a call from any concrete company’s telephone. There are no definite groups for picking up the call. One can pick up the call from any telephone set; it is only necessary to enter the required code and the extension number of the phone, which has to be picked up.
Band X
Founded in 1997, Band-X is a privately-owned company, headquartered in London, with investors including Madison Dearborn and Morgan Stanley Venture Partners.. Band-X provides the telecoms industry with a range of specialist voice services delivering great
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