3.2.3 System Diagnostics
The System Diagnostics/Statistics screen looks like this:
OK
NOTE: This screen is updated once per second.
The System Diagnostics/Statistics options and functions are described below.
aLocal Loop Idle (default)
The Local Loop is a bi-lateral loopback in which the data from the local DTE and the data from the remote unit are looped back to their respective sources (See Section 5.3). Activate this loop to test the each of the DTE’s connection to the NetLink-T1™.
The Local Loop test has four states:
Idle No user-controlled loopbacks are active.
LLThe NetLink-T1™ is in local loopback mode.
Off The NetLink-T1™ is in remote loopback mode or sending a pattern. Local loopback is disabled.
LocP The NetLink-T1™ is in Local Loopback mode, and is sending a test pattern.
bRemote Loop Idle (default)
The Remote Digital Loopback (RDL) test checks the performance of both the local and remote NetLink-T1™s, as well as the communica- tion link between them. Data from the local DTE is sent across the entire communication circuit and looped back to the local DTE.
The NetLink-T1™ Initiating a RL can be in one of the following states:
Idle No user-controlled loopbacks are active.
TxPr The NetLink-T1™ is sending the preparatory phase pat- tern lasting for approximately 2 -5 seconds.
WtAk The NetLink-T1™ is waiting for an acknowledgement from the remote unit. If the remote unit does not respond, the WtAk message will remain on the screen.
RxAk The NetLink-T1™ has received an acknowledgement from the remote unit.
Tout The NetLink-T1™ is waiting before entering the Remote Loopback test mode.
TM The NetLink-T1™ has successfully negotiated the Remote Loopback test and is in control of the remote unit. You may send a test pattern at this point by press- ing:
c <spacebar>
TxTr The NetLink-T1™ is sending a Terminate Loopback mes- sage to the remote unit. If the remote unit does not respond, the local unit will return to the Idle state.
Tx1s If the remote NetLink-T1™ responds to the local NetLink- T1™’s terminate loopback request, the local unit then sends an all ones pattern before returning to the Idle state
TxP The NetLink-T1™ is sending a test pattern while in Test Mode
IdlP The NetLink-T1™ is sending a test pattern in place of data. The NetLink-T1™ is not in test mode.
