[asterisk-users] importance of crc4 in zaptel.conf?

[Erik]

Ask your Telco what you should use, they could be using CRC4 framing, in that case you have to match your config.


Louis-David Mitterrand wrote:
> Hello,
> 
> We have a TE410P connected to an EuroISDN E1 with these span 
> definitions:
> 
> 	span=1,1,0,ccs,hdb3
> 	span=2,1,0,ccs,hdb3
> 	span=3,1,0,ccs,hdb3
> 	span=4,1,0,ccs,hdb3
> 
> Why should we add "crc4" to these definitions? What does it do?
> 
> Thanks,
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Erik Versaevel