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).
Introduction
With a traditional PBX system, or private branch exchange, everything is done over live phone lines. Stations are utilized to route and reroute phone calls in order to allow a caller to reach the party they want to talk to. While this is a perfectly acceptable method of doing business, as technology grows, so do the incentives for upgrading to newer business telephone systems.
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