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).
A telecommunication mechanism allowing the user to redirect the incoming
call to another telephone, using the “Transfer” button and dialling a number of
the set where the call will be redirected.