Symmetricom 1000, 1100 manual Testing the Communication Ports, Detecting Input Errors

Chapter 5 Testing the TimeProvider

Testing the Communication Ports

Detecting Input Errors

You can provision the TimeProvider to perform a variety of functions when an input error occurs. Possible errors include:

AIS - Alarm Indication Signal

LOS - Loss of Signal

OOF - Out of Frame

Loss of Alignment

Excessive wander

Input is disqualified

GPS faults

The TimeProvider reports these and other errors on the front panel alarm LEDs, in an autonomous event message, and via devices connected to the alarm relays. You can provision each error to a specific alarm level (Minor, Major, or Critical).

Setting an Alarm Strategy

You can set up the input alarms to prevent spurious input errors from triggering an alarm. The FLTDELAY keyword parameter sets a period from 1 to 15 seconds that an input error must be present before the alarm is issued. You can provision the alarm to clear from 1 to 1000 seconds after the input error clears using the CLRDELAY keyword parameter. Use the ED-SYNC command syntax described in Provisioning System-Level Alarms, on page 130 to provision the FLTDELAY and CLRDELAY keywords.

Testing the Communication Ports

The TimeProvider has three communication ports. This section describes how to test each port; if you do not plan to use a port, then you can skip the corresponding test.

Local Craft serial port

Remote serial port

Ethernet port

Testing the Local Craft Serial Port

The local Craft serial port is on the faceplate of the IMC or IMC/TPIU, and is configured as a DCE device. The default settings for the local Craft serial port are 9600 Baud, 8 bits, no parity, 1 stop bit, echo on, and handshaking disabled.

To connect a device to the local Craft port, perform the following steps:

097-58001-02 Revision G – April 2008 TimeProvider User’s Guide 151