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).
Numbers starting with 0800, 800, 1-800 are usually toll-free for the caller; the called party, however, has to cover the charges on those calls.
ISG | Network Billing Systems (NBS)
With state-of-the-art corporate headquarters in Wayne, New Jersey, the ISG family has evolved into a multi-divisional organization serving over 750,000 customers from coast to coast. Today ISG is positioned at the forefront of global technology with a str
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