CHAPTER 1: BX7000 Multi-Access Gateway Overview
16
Advanced Clocking Module
Copyright © 2010, Juniper Networks, Inc.
Table 6 on page 16 shows the features of the advanced clocking module.
Table 6: Advanced Clocking Module Features
Hardware features
z
Stratum 3 level clock synchronization
−
Accuracy or adjust range: 4.6 x 10
–6
−
Pull in range: Must be capable of synchronizing to
clock with accuracy with ±4.6 x 10
–6
−
Stability: 3.7 x 10
–7
−
Time to first slip: 6 minutes (255 in 24 hrs)
z
Integrated design to support synchronization accuracy
−
±50 ppb with OCXO
−
±280 ppb with TCXO
z
Programmable priority for reference clock inputs
Internal
−
T1/E1 (1.544/2.048MHz) line clocks
−
Ethernet recovered clocks
−
IEEE1588V2 recovered clock
−
xDSL NTU-R timing
External
−
BITS T1/E1 (1.544/2.048 MHz) through RJ-45 (Cat 3)
−
10 MHz, LVCMOS through BNC connectors (50 ohms
TTL)
z
Provides synchronized reference clock outputs
Internal
−
T1/E1 (1.544/2.048 MHz) line clocks to mother board
and daughter board
−
25 MHz clock to Ethernet interface in mother board
and daughter board
−
8.192 MHz clock to mother board
−
19.44 MHz clock to mother board for differential
clock recovery
z
Meets ITU-T G.823/G.824 for E1/T1 timing requirements
z
PTP IEEE1588v2 support for slave mode
z
Field-replaceable unit but not hot-swappable
z
Board ID EEPROM and anti-counterfeit for secure
access
z
Temperature monitoring
z
Provided with heat sink arrangement for heat transfer
z
LEDs for synchronization status (reference source lock
or unlock)
Summary of Contents for BX7000
Page 10: ... x Copyright 2010 Juniper Networks Inc ...
Page 12: ... xii Copyright 2010 Juniper Networks Inc ...
Page 18: ...About This Guide xviii Requesting Support Copyright 2010 Juniper Networks Inc ...
Page 20: ... 2 Copyright 2010 Juniper Networks Inc ...
Page 66: ... 48 Copyright 2010 Juniper Networks Inc ...
Page 90: ... 72 Copyright 2010 Juniper Networks Inc ...
Page 122: ... 104 Hardware Compliance Copyright 2010 Juniper Networks Inc ...
Page 131: ...Copyright 2010 Juniper Networks Inc 113 Appendix E Declaration of Conformity ...
Page 132: ... 114 Copyright 2010 Juniper Networks Inc ...
Page 133: ...Copyright 2011 Juniper Networks Inc 115 PART 4 Index z Index on page 117 ...