Seagate ST3390N Guía de instalación descargar pdf (Pagina 330)

100

101

17-22 Troubleshooting operational problems

Silent channels

Standard 1.0 Modular Option EC Installation and Maintenance Guide November 1999

Silent channels

Silent channel—calls

have no voice and

produce a SEER

When you have a silent channel where calls have no voice

and produce a SEER, follow these steps.

Step Action

1 Check the status of channels by placing a call and watching the

status of the channel on the DSP Port Status screen. Load

Overlay 80 and do a call trace on the TN that is under test, as

outlined in the

X11 Input/Output Guide

(NTP 553-3001-400).

If the result shows the channel being acquired, the network

loop path from Meridian Mail to the Meridian 1 is correct and

secure.

If not, check the SEER printout for messages related to that

channel. Then take appropriate action for that SEER.

2 Make sure that Meridian Mail has been configured with valid

TNs and secondary DNs by checking the CAT table. If the TNs

or DNs are incorrect for a particular card, follow steps 2a to 2d.

TN restriction formats:

loop is double density only

shelf = 0 or 1

card = 2 or 3

unit = 0 to 7

a. Disable the card using the System Status and Maintenance

function, as described in the

System Administration Guide

(NTP 555-7001-30x).

b. Log in to the TOOLS level. Select the “Modify hardware”

tool, and modify the TNs and DNs if necessary.

c. Change the DNs in the CAT table.

d. Perform out-of-service diagnostics, and reenable the card.

3 Ensure that each network loop is configured on the Meridian 1

by performing loop diagnostics in LD 30. Refer to the

X11 Input/

Output Guide

(NTP 553-3001-400).

4 Check the voice cards:

a. Disable and reseat the voice cards.

b. Perform out-of-service diagnostics.

c. Reenable the voice cards.

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Seagate ST3390N Guía de instalación Pagina 330

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