EXPIRED Neat GPS clock SFP module - $20

[niekbergboer]

Try this. I probably got it from the same seller as you did. The username and password listed below are in the manual somewhere.

username is root and password is ChgMeNOW

I just open a terminal and copy/paste

ssh -o KexAlgorithms=diffie-hellman-group1-sha1 -o Ciphers=aes256-cbc root@192.168.0.2

and enter the above password when asked.

Woah, thank you! Indeed, that was the password.

 

[niekbergboer]

I had to put the unit into 1588v2 mode before it would work if I put it into an SFP port on a switch, but the results are... impressive:

$ chronyc sources
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
#* PHC0 0 2 377 2 +7ns[ +11ns] +/- 1677ns

 

[SnJ9MX]

I had to put the unit into 1588v2 mode before it would work if I put it into an SFP port on a switch, but the results are... impressive:

$ chronyc sources
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
#* PHC0 0 2 377 2 +7ns[ +11ns] +/- 1677ns

do note that with that particular measurement, it is comparing the system clock to the physical hardware clock of the NIC itself. if you're using linuxptp, there is a different measurement that compares the NIC PHC to the PTP source.

 

[niekbergboer]

Well I finally pulled my NIC out to remove the module, the SMA jack definitely seemed loose, so I opened it up, and sure enough, it had broken loose. I'm pretty sure there's enough left of the pads to fix it, but not today. I am rather surprised it ever worked at all.
View attachment 36201

Speaking of which, nexox; this happened to me too :hmm:. How did you manage to open up the module without total carnage?

 

[nexox]

Speaking of which, nexox; this happened to me too :hmm:. How did you manage to open up the module without total carnage?

It's been a while and I think I posted the method in this thread somewhere, but it starts with gently prying up the ends of the spring finger skirt thing that presses against the inside of the SFP slot, once that's out of the way there a couple screws to remove. I did get the SMA jack soldered back on well enough to make it work, but it's real fragile now.