E1 configuration on mc3810

Hi All!

Could someone Please let me know if mc3810 support E1 R2 or R1 signaling.
According to the documentation it does not support R2 , however
working with E1 CAS. Does it mean that it supports R1 ?
With ISDN PRI cisco mc3810 working without any problems, but
it is not suitable for us.
I need to make it work with E1 (R1 or R2), but still with no success.
Cisco equipped with DVM-E1.
(IOS version is 12.1(5)XM3)

Any help is very highly appreciated.
Thanks in advance.

Regards,
Roman.