Symmetricom 1000, 1100 manual Clocks, LAN Port

Chapter 7 Specifications of the TimeProvider

Clocks

LAN Port

The Ethernet 10BaseT port supports 10 full-duplex telnet sessions over TCP/IP. To minimize response delays, Symmetricom recommends that you keep four or fewer sessions open at any one time.

Clocks

The clocks in the TimeProvider are controlled with Direct Digital Synthesis technology for calibration-free operation and precise frequency control.

Type I Clock

The Type I clock in the TimeProvider is compliant with ITU-T G.812 (06/98) and EN300 462-4-1 (see ICS proforma Compliance Annex B).

Type II Clock

The Type II clock in the TimeProvider complies with G.812 (06/98).

Type III Clock

The Type III clock in the TimeProvider complies with G.812 (06/98).

Type ST2 Clock

The Stratum 2 clock in the TimeProvider complies with ETSI 300 462-4, ANSI T1.101-1999, and Telcordia GR-378/1244-CORE.

Type ST3E Clock

The Stratum 3E clock in the TimeProvider complies with ETSI 300 462-4, ANSI T1.101-1999, and Telcordia GR-378/1244-CORE.

SSM Compliance

The TimeProvider complies with the following SSM standards: ANSI T1.101-1999, GR-253 Core Issue 3, September 2000, ITU-T G.704 10.98, and T1X1.3 TR33.

Holdover

Table 7-2lists the holdover characteristics of the Clock cards available for the TimeProvider.

Table 7-2. Holdover Characteristics

Card Type	Holdover Performance	Holdover Performance
	PRR Mode	SSU Mode
Single Oven	GR-2830-CORE Issue 2	GR-1244-CORE Issue 2 ST3E or
090-58021-01	Office PRS	ITU-G.812 Type I (6/98)
Rubidium	GR-2830-CORE Issue 2	GR-1244-CORE Issue 2 ST2 or
090-58022-01	Office PRS	ITU-G.812 (6/98) Type II

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