# Packet received time off by years (1999)

**URL:** <https://www.thethingsnetwork.org/forum/t/packet-received-time-off-by-years-1999/29718>\
**Category:** MultiTech Gateways\
**Created:** [September 6, 2019, 5:17pm UTC](https://www.thethingsnetwork.org/forum/t/packet-received-time-off-by-years-1999/29718 "2019-09-06T17:17:02Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![mc-404](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/mc-404/32/25844_2.png) [@mc-404](https://www.thethingsnetwork.org/forum/u/mc-404)\
**Post date:** [September 11, 2019, 2:29am UTC](https://www.thethingsnetwork.org/forum/t/packet-received-time-off-by-years-1999/29718/4 "2019-09-11T02:29:20Z")

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I’ve set up things according to [these instructions](https://www.thethingsnetwork.org/forum/t/multitech-conduit-how-to-enable-the-inbuilt-gps/17937), where ttyXRUSB2 is mentioned. Also, on the Multitech Conduit there’s a symbolic link from /dev/gps0 to /dev/ttyXRUSB2. So I suppose the path should be right. I tried to run the tests you suggested, but they don’t seem to work:  
admin@mtcdt:~$ sudo cat \< /dev/ttyXRUSB0  
-bash: /dev/ttyXRUSB0: Permission denied  
admin@mtcdt:~$ sudo cat \< /dev/ttyXRUSB1  
-bash: /dev/ttyXRUSB1: Permission denied  
admin@mtcdt:~$ sudo cat \< /dev/ttyXRUSB2  
-bash: /dev/ttyXRUSB2: Permission denied  
admin@mtcdt:~$ sudo cat \< /dev/ttyXRUSB3  
-bash: /dev/ttyXRUSB3: Permission denied  
admin@mtcdt:~$  
The packet forwarder has been stopped before executing the tests, an I tried both with started and stopped gpsd.  
Speaking of gpsd - it is enabled by default. Is it needed for the packet forwarder supporting TDOA timestamps or does it interfere with it?

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