L3P CIC PPL Timers (ANSI)

Timer ID | Timer | Default Value (10ms)
--- | --- | ---
0x01 | Wait For SS7 Network Response | 36000
0x02 | Wait For L4 Response | 3000
0x03 | Wait For L4 Maintenance Loopback ACK | 3000
0x04 | Wait For GRS. Used in OOS Protocol | 500

See Signaling System Number Seven.
A type of diagnostic test in which the transmitted signal is returned to the sending device after passing through a data communications link or network.
Positive acknowledgment to a message
Out of Service