Avaya 03-300430 User Manual

Notes for Sheet 1 through Sheet 5 flowcharts. (When checking for slip errors, use the previous 

1. Use status synchronization to see if synchronization is enabled, and to determine 

the on-line reference. If the on-line reference is a Tone-Clock board, the switch is operating 
in free run mode.

If Stratum 3 is displayed, and no DS1s are connected to the Stratum-3 clock or no DS1 
connection existed to the Stratum-3 clock for over 24 hours, then the Stratum-3 clock is in 
free run mode.

2. Check for slip errors against DS1-BD and UDS1-BD. In the error log (display errors) 

look for the following error types to identify slips against these board types.

For slips on either of these board types, first refer to the individual boards section in this 
manual. Follow the test and repair steps in those sections. 

3. If Stratum 3 is administered (display synchronization) and on-line (status 

synchronization), check for DS1-BD or UDS1-BD slip errors for the DS1(s) or UDS1(s) 

used as input to the Stratum-3 clock. Check the LED indications on the Stratum-3 clock to 
determine which DS1 is providing input to Stratum 3, and examine the cross-connect 
information for that DS1.

4. Check for slips errors against EXP-INTF, SNI-BD, and TDM-CLK. In the error (display 

errors) log look for the following error types to identify slips against these board types.

5. Check status synchronization for the current DS1 reference. If a DS1 or UDS1 is the 

on-line reference, check for slips on that DS1 or UDS1.

6. Check for LOS, Blue, Yellow, and Red alarms on the on-line reference facility, and fix those 

problems first. Check for slips, misframes, minor and major error rates and fix those 

DS1 Interface

DS1-BD

3073 - 3160

UDS1 Interface

UDS1-BD

3073 - 3160

Expansion Interface

EXP-INTF

2305

Switch Node Interface

SNI-BD

1537

Tone Clock

TDM-CLK

1025

DS1 Converter

DS1C-BD

3329