The function of custom greeting allows greeting the
callers by messages which present your company or by any other variant which
conforms to the structure of your company.
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).