Ross 4500DR-104-07, Руководство пользователя, Страница: 149 / 161

SRG-4500 User Guide (v7.0) PTP Option • 149
8. Use the Mode menu to specify the preferred PTP mode of operation. Choose from the following:
• Off — The PTP engine is off. It does not participate in any PTP activity. It does not lock to any reference.
• PTP Multicast Follower — The device is a PTP Follower. It uses multicast messages for all network
messages.
• PTP Mixed Mode Follower — The device is a PTP Follower. It uses multicast messages for most network
messages. It uses Unicast messages for Delay Request and Delay Response messages.
• PTP Grandmaster (Active) — The device is a PTP Grandmaster. It sends Announce, Sync and Follow Up
messages irrespective of whether it sees a better (BMCA) Grandmaster on the network or not. Some PTP
Followers and PTP management systems keep a pool of known Grandmasters to aid in redundancy and
speed of switching between Grandmasters. In a SMPTE ST2022-7 topology, selecting this mode ensures the
backup device will always be active, at least in the top node of the network.
• PTP Grandmaster (Passive) — If not selected by BMCA, the device is a PTP Grandmaster. If it sees a
better (BMCA) Grandmaster on the network, it suspends send all messages. If it later becomes the best
(BMCA) Grandmaster, it resumes sending all messages.
9. Use the Domain menu to select value for the Domain (Range 0 – 127).
10. Use the Priority 1 menu to select value for Priority 1 (Range 0 – 255).
11. Use the Priority 2 menu to select value for Priority 2 (Range 0 – 255).
12. Use the PTP Profile menu to specify the required PPTP Profile. Choose from the following:
• IEEE1588 (default)
• SMPTE-2059: 2015
• AES67-R16: 2016
13. Use the SMPTE Profile Parameters (Advertise System Frame Rate, Advertise Use Drop Frame, and Advertise
Use Color Frame ID if required).
14. Click
Apply New PTP Network Settings
to apply the new PTP Network Settings.
15. Click
PTP Restart Confirm
to restart the PTP engine.
 This will restart the PTP engine on the SRG-4500 and there will be a disruption to the PTP service until it is
relocked.
Status Fields
The following status fields report read-only information:
• UTC Time — Displays the current UTC Time.
• PTP – MAC address — Displays the PTP port MAC address.
• PTP Clock ID — Displays the PTP Clock ID.
• PTP Grandmaster Status — Displays the current profile status.
• PTP Alert — Displays any PTP alert message.
• PTP Status Alarm — Displays alarm status from Red (Locked), Yellow (Locking), and Green (Locked).
Detailed View Options
If the Detailed View box is selected, the following additional options are displayed in DashBoard:
• DSCP Qos — Choose from the following:
› 46 – Expedited forwarding