[Asterisk-Users] E1/T1 configurations

[janvb at caselaboratories.com]

hi

>>
>>
>> Not all E1 providers have crc4 turned on.
>>  
>>
> Except for ISDN lines, E1s hardly ever have CRC4 turned on. As you 
> said, some countries don't even turn it on for ISDN, which is stupid.

It is a historic reason for this cause the first E1/ISDN connections 
where on computers that did not have sufficient CPU power to maintain 
CRC, meaning that the standard leave this as optional. But, you can 
usually get it switched on per line.

jvb