0x0001

Link Activation Failure

0x0002

Signaling link failure.

This is an existing PPL Event Indication to which Q.752 Parameters are added (unless operating under backward compatibility).

A single ICB of type Q.752 Parameters is included with the following parameters:

0x0000 Timestamp
0x0001 Interval sequence number
0x001d Link failure reason code

0x0003

Signaling link test failure.

This is an existing PPL Event Indication to which Q.752 Parameters are added (unless operating under backward compatibility).

A single ICB of type Q.752 Parameters is included with the following parameters:

0x0000 Timestamp

0x0001 Interval sequence number

0x0004

Signaling link restoration.

A single ICB of type Q.752 Parameters is included with the following parameters:

0x0000 Timestamp
0x0001 Interval sequence number