Cisco Cisco IOS Software Release 12.2(8)T

Router(config-controller)# ds0-group 

channel-number timeslots range type signaling-type 

type addr info service service-type

For the CAS PBX scenarios only: Configures the T1 
time slots for CAS calls. The scenarios use the 
following three digital signal level 0 (DS-0) 
definitions:

ds0-group 1 time slots 1-8 type 
e&m-immediate-start

ds0-group 2 time slots 9-16 type e&m-wink-start

ds0-group 3 time slots 17-24 type fxs-ground-start

Router(config-controller)# exit

For the CAS PBX scenarios only: Exits controller 
configuration mode.