I need to build a hunt group in the switch for numbers 4201, 5201 and 6201 on one phone hunting then to 4205, 5205 and 6205 on another phone. They are using keys 3, 4 and 5 on both 3904 phones, key 0 belongs to the individual with voicemail, switch is option 11c. Not sure of which ld to use or what commands to enter.