Symmetricom 1000 Provisioning the SSM, Reading SSMs, Defining the SSM Bit Position, Ssmena Enable

Chapter 4 Provisioning the TimeProvider

Provisioning the Input Reference

Provisioning the SSM

Before you can read Synchronization Status Messages (SSMs) on certain input signals, you need to provision the TimeProvider to read the incoming SSM and identify the bit position of the SSM. SSMs are on the following types of input signals:

E1, CAS4, CCS4

T1, ESF

Reading SSMs

To enable the use of SSMs, you must first provision the TimeProvider to read SSMs on the input. Use the ED-SYNC command to enable the specified input to read SSMs.

ED-SYNC:[<tid>]:<aid>:[<ctag>]::<keyword>=<value>;

This command has a default access level of ADMIN.

<aid>	<keyword>	<value>	Description	Default value
INPp	SSMENA	ENABLE	Provisions the T1 ESF or	ENABLE
p = 1 2		DISABLE	E1 (CAS/CCS) input to
			read the received SSM

Sample Command

ED-SYNC::INP1:TS1000::SSMENA=ENABLE;

Autonomous Message

TP-SSU 03-10-24 11:02:28 A 1186 REPT EVT

“INP1,T1:NA,SSMENA,NSA,03-10-24 11-02-28:\"INPUT READING OF SSM HAS CHANGED,ENABLE\””

;

Defining the SSM Bit Position

After you enable an E1 (CAS/CAS) input to read SSMs, you must then define the bit containing the SSM.

ED-SYNC:[<tid>]:<aid>:[<ctag>]::<keyword>=<value>;

This command has a default access level of ADMIN.

<aid>	<keyword>	<value>	Description	Default value
INPp	SSMBIT	4 5 6 7 8	Provisions the E1 (CAS/	8
p = 1 2			CCS) SSM bit position.

Sample Command

ED-SYNC::INP1:TS1000::SSMBIT=4;

097-58001-02 Revision G – April 2008 TimeProvider User’s Guide 115