[Jun 14 12:01:47] NOTICE: chan_dahdi.c:10518 pri_dchannel: PRI got event: HDLC Bad FCS (8) on Primary D-channel of span 1
[Jun 14 12:01:47] NOTICE: chan_dahdi.c:10518 pri_dchannel: PRI got event: HDLC Abort (6) on Primary D-channel of span 1
repeat and repeat…
NOTICEs are not error messages, although in this case they are reporting errors.
Bad FCS means that there is a frame check sequence error, i.e. a block of data has been received which fails its self check.
Abort means that more consecutive ones have been received than are allowed (there needs to be a zero, which is removed from the data, after every 5 (I think) ones).
Both of these indicate either very poor signal quality or incompatible settings between the two ends of the link.
As this is a Digium card, you should use Digium’s commercial support service, not this open source peer support forum.
For that, you will need the serial number of the card.
More generally, you will need to identify what is on the other end of the line, the name of service product, if it is a standard service, or details of how it is configured, otherwise, and also how it has been configured for both Asterisk and Dahdi at your end.
Generally, the PSTN should provide timing, so if this is a PSTN link, check that you are letting it do that.