Difference between Channel groups and TDM groups

[mtnhigh]

I am converting from an adtran 3200 to a cisco 2811, I have 2 t1csu/dsu to configure, (strictly data) What is the difference between channel groups and tdm groups?

thanks
pietto

 

[plshlpme]

looks like tdm groups are used when crossconnecting channel groups between two cards in the router?

http://www.cisco.com/en/US/products...ts_feature_guide09186a00801a88f4.html#1049770

channel group is used when you are settign up a specific bandwidth circuit..

ive always used channel groups when setting up my piont to point circuits...