On digital phones you can program the huntgroup enable/disable feature onto the buttons in digital telephony, remember to specify which group by entering the group number in the number field or you will enable/disable yourself from all groups u r a member of. If analogue phones you need to create short codes, there is a default one, but again u will need individual codes if you want to specify the group. Also with phone manager pro you can specfy what groups the user logs into.
Soopa Doopa Intergalactic IP Office installation mechanic and configuration corruptor from way back.