Can I run IPTs at 1ms PTP packet size

Owned by ernie addow
Last updated: Jul 15, 2022 by Jason Fernandes
2 min read

Q1 What is Clear-Com’s recommendation in terms of running IPTs using 1ms PTP packet size?

A1 Avoid it in systems without PTP aware switches.

 

Q2 I know Clear-Com prefers to use 125μs PTP,  but if I had to run at 1ms PTP, are there any short comings I should look out for?

A2 The risk is with loss of DECT sync due to PTP packets getting delayed behind RTP-audio packets in the Eth-Switch buffers.

 

We use PTP to generate the local RF DECT sync within each antenna, this enables Beltpacks to roam between antennas.

If the jitter on the PTP is too much then this can lead to a lack of RF DECT sync . We can handle up to ±1000ns.

 

If you had to use IPTs with 1ms PTP on a network without PTP aware switches..