Symmetricom EDGE CLOCK 1000 - Manual (Page 195)

097-58001-02 Revision G – April 2008 TimeProvider User’s Guide 195
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 7-2 lists the holdover characteristics of the Clock cards available for the
TimeProvider.
Table 7-2. Holdover Characteristics
Card Type
Holdover Performance
PRR Mode
Holdover Performance
SSU Mode
Single Oven
090-58021-01 GR-2830-CORE Issue 2
Office PRS GR-1244-CORE Issue 2 ST3E or
ITU-G.812 Type I (6/98)
Rubidium
090-58022-01 GR-2830-CORE Issue 2
Office PRS GR-1244-CORE Issue 2 ST2 or
ITU-G.812 (6/98) Type II