IBM SY44-5902-05 manual Service Functions V5R2

vYou can run the tests only on non-switched synchronous data link control (SDLC) lines.

vFor multiport DCEs, the DCEs and Line Status test does not interrupt normal communications. The other LPDA-2 tests might interrupt normal communications.

vYou cannot run the tests on an active secondary line. A line is secondary if its data link role is either secondary or is negotiable and has negotiated to a secondary role. A line is active if a controller description under the line is varied on.

The DCEs and line status and DCEs and line test options are two modes of the same LPDA-2 request.

The DCEs and Line Status test reports parameters that the local and remote DCEs monitor during normal communications.

The DCEs and Line Test reports these parameters, runs internal tests, and reports the results. If poor line conditions are causing problems at normal speed, this test is sent over the communications line to the remote DCE at a slower transmit speed.

These two tests return the following information:

vConfiguration summary

This includes DCE type and model, address, operating mode, transmit speed, network function, LPDA-2 code level, switched network backup (SNBU) status, data terminal equipment (DTE) interface connection, and installed features.

vDCEs and line parameters

These include receive level, number of received line signal detector (RLSD) losses, line quality, number of line errors, ages of remote DCE power-off and failure, ages of local DCE reinitialization and error conditions, DCE idle condition, base DCE in error, and features in error.

vRemote DCE interface status

This reports the current status and previous activity of the signals on the DTE interface lines attached to the remote DCE. The DCE monitors the following signals:

–Request to send

–Ready for sending

–Transmit data

–Receive data

–Received line signal detector or carrier detect

–Data signalling rate selector

–Data terminal ready

–DTE power loss detected

–Test control

You can run the Analyze line test only on analog DCEs (modems). The test causes the modems to exchange test patterns on the line. The modems measure parameters of the analog signals. The modems report:

vFrequency shift

vSecond and third harmonic distortion ratios

vSignal to noise ratio

318Service Functions V5R2