Basic System Configuration Guide System Management
Edition: 01 3HE 11010 AAAC TQZZA 285
6.10.1.2.5 PTP
Precision Time Protocol (PTP) is a timing-over-packet protocol defined in the IEEE
1588v2 standard 1588 2008. PTP provides the capability to synchronize network
elements to a Stratum-1 clock or primary reference clock (PRC) traceable source
over a network that may or may not be PTP-aware.
The ptp command specifies the PTP source as an option for recovered time for the
1pps (1 pulse per second) port. The specific PTP clock is identified by clock-id (from
1 to 16 for PTP clocks that use IPv4 encapsulation, and csm for the PTP clock that
uses Ethernet encapsulation) and has an assigned priority-value (from 1 to 16).
CLI Syntax: config>system>time
ptp
clock clock-id time-ref-priority priority-
value
clock csm time-ref-priority priority-value
Example: config>system>time# ptp
config>system>time>ptp# clock 1 time-ref-priority 1
6.10.1.2.6 Time-of-Day Measurement (ToD-1pps)
The 7705 SAR can receive and extract time of day/phase recovery from a 1588
grand master clock or boundary clock and transmit the recovered time of day/phase
signal to an external device such as a base station through an external time of day
port, where available. Transmission is through the ToD or ToD/PPS Out port with a
1 pulse/s output signal. The port interface communicates the exact time of day by the
rising edge of the 1 pulse/s signal.
The tod-1pps command specifies the format for the time of day (ToD) message that
is transmitted out the ToD or ToD/PPS Out port and specifies whether the 1pps
output is enabled.
CLI Syntax: config>system>time
tod-1pps
message-type {ct | cm | irig-b002-b122 | irig-
b003-b123 | irig-b006-b126 | irig-b007-b127}
output
Example: config>system>time# tod-1pps
config>system>time>tod-1pps# message-type ct
config>system>time>tod-1pps# output
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