Spectracom NetClock 9489 - PTP Grandmaster [1204-32]; PTP Grandmaster [-32]: Specifications

Signature Control: Controls when the output will be present; see "Signature Control" on
page141.
Mode: This option selects T1, E1, or disabled mode. For T1 mode, the clock output will
be 1.544MHz, and for E1 the clock output will be 2.048MHz.
SSM Enabled: Enables or disables Sync Status Messaging (SSM). T1 SSM is not valid
with D4/Superframe or AIS framing. E1 SSM is not valid with AIS framing.
E1 Encoding: HDB3 only.
E1 Framing: This option selects the framing standard (CRC-4, No CRC-4, or AIS).
T1 Framing: This option selects the framing standard (D4/Superframe, Extended Super
frame [CRC-6/no CR C-6], or AIS).
T1 Encoding: This option selects the encoding method (B8ZS or AMI).
T1 SSM Value: This option selects the SSM quality level transmitted when SSM is
enabled.
E1 SSM Value: This option selects the SSM quality level transmitted when SSM is
enabled.
5.2.7 PTP Grandmaster [1204-32]
Precision Time Protocol (PTP) is a protocol that can be used to synchronize computers on an Eth
ernet network. The Precision Time Protocol (PTP) option module supports PTP Version 2, as spe
cified in the IEEE 1588-2008 standard (PTP Version 1 is not supported), via one (1) Ethernet
port.
The PTP option module implements a PTP Ordinary Clock that can be configured to run as a
Master Clock only. It transmits PTP packets via the Ethernet port, with information about the cur
rent time and synchronization reference selected by the NetClock device.
5.2.7.1 PTP Grandmaster [-32]: Specifications
Inputs/Outputs: (1) Configurable as Input or Output
Signal Type and Connector: Ethernet via SFP, and 1PPS Output via BNC
Management: Web UI
Resolution: 8ns (±4ns) packet time stamping resolution
Accuracy: 30ns accuracy (3σ) Master to Slave, via crossover cable
Network Speeds: 100 Mb/s, or 1Gb/s, depending on SFP module used
PTP Version supported:PTP2 (IEEE 1588-2008)
NetClock User Reference Guide 365
APPENDIX