The bits of a message signal unit that carry information particular to a certain user transaction and always contain a label. [T1.110-1987] [T1.226-1992]

A transmission facility that consists of a signaling data link and its transfer control functions, used for reliable transfer of a signaling message. [After T1.236-1993]

The process of making a signaling link ready to carry signaling traffic.

An event that causes the unavailability of a signaling link, typically consisting in a "processor outage" condition at one end of that signaling link. [T1.110-1987] [T1.226-1992]

1. A field with certain signaling network management messages, which indicates the particular signaling link to which the message refers among those interconnecting the two involved signaling points.
2. A field in signaling link test message as well as in some signaling network management messages that indicates the particular signaling link, interconnecting the two involved signaling points, to which the… (Read More →)

The procedure by which a signaling link is taken out of service. [T1.110-1987]

An event that causes the unavailability of a signaling link, typically consisting of a failure in signaling terminal equipment or in the signaling data link. [T1.110-1987] [T1.226-1992]

A set of signaling links directly connecting two signaling points and having the same physical characteristic (bit rate, propagation delay, and the like). [T1.110-1987]

One of a group of functions that control and take actions when required to preserve integrity of locally connected signaling link sets. [T1.226-1992]

An event characterizing the completion of the initial alignment procedure on a signaling link following the removal of the previous causes of failure; in the absence of any other causes of its unavailability, the signaling link once again becomes available. [T1.226-1992]