A feature of the North American Numbering Plan that identifies customer dialed calls that are operator assisted, either by electronic or manual (human) means. [After T1.401-1988]

Abbreviation for zero transmission level point.

10/100BaseT: 10/100 Mbps baseband twisted-pair (Ethernet)

: In telephony, a noise weighting used in a noise measuring set to measure line noise as it would be perceived if the line were terminated with a No. 144-receiver, or a similar instrument. Note: The meter scale readings are in dBrn (144-line).

In telephony, a noise weighting used in a noise measuring set to measure noise across the receiver of an instrument equipped with a No. 144-receiver. Note: The meter scale readings are in dBrn (144-receiver).

1xRTT: Single Carrier Radio Transmission Technology.

2.5G: 2.5ndGeneration Wireless

2G: 2nd Generation

3G: 3rd Generation

3GPP: 3rd Generation Partnership Project