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.

10/100 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).

Single Carrier Radio Transmission Technology.

2.5nd Generation Wireless

2nd Generation

3rd Generation

3rd Generation Partnership Project

3rd Generation Partnership Project, 2

Third Generation GSM Services

50-Gigabit-capable Passive Optical Network

The main operations support system used to create and update Toll Free records that are then downloaded to Service Control Points (SCPs) or RouteLink for processing Toll Free Service calls. The system is used by Resp Orgs to manage and administer SMS/800 records.

An entity designated under state law or regulation to have decision-making and oversight responsibilities for a 9-1-1 Emergency Number System for one or more PSAPs.

A carrier access code for obtaining switched access to interchange carriers where (a) the calling customer accesses the IC and passes the address information, if any, in two distinct operations; (b) the calling customer usually uses in-band signals to pass the address, if any, to the IC; and (c) the EC does not repeat the address information.
Note: The X… (Read More →)