BRTS-100 ISDN TEST SET
5.2 Activation/Deactivation Modes
The following information provides the steps that lead to an Active Link state and subsequent Activation/Deactivation modes (Figure 5-2) between the Test Set (TE) and an NT device. The Test Set uses this Activation/Deactivation procedure in Line Test, Transmit, and D Activity modes. See Figure 5-3 for a diagram of Info 0–Info 4.
DIU—Deactivate Indication (Timer [32 ms] expired or Info 0 received [during 16 ms] after deactivation request).
AIU—Activate Indication (Synchronous Receiver).
ARU—Activate Request (Info 1 Received).
RSYD—Resynchronization of U-Interface (Transmission of pseudo ternary pulses at 96-KHz frequency after loss of synchronization of U-Interface; Info 2).
ARD—Activate Request (Transmission of Info 3). AID—Activate Indication (Transmission of Info 4, Active Link). DR—Deactivate Request.
0.5ms MAX 6ms
16ms
INFO 0
INFO 1
INFO 2
INFO 3
INFO 4
INFO 0
INFO 0
MAX 2ms4ms
Figure 5-2. Activation/deactivation procedure.
