Can also be used to change a BT78a or BT80a into a BT77a.
BT 77A 3 Pair 6 Way IDC Internal Telephone Cable Junction Connection Box BT77A
5x BT 77A 3 Pair 6 Way IDC Internal Telephone Cable Junction Connection Box
BT 78A 4 Pair 8 Way IDC Telephone Cable Junction Box BT78A Replacement Board
3 Pair/6 Way IDC Junction Box BT Telephone Phone Cable Coupler Socket Connector
BT 77A 3 PAIR IDC JUNCTION BOX FOR TELEPHONE CABLE BT77A WITH IDC TOOL
BT 77A 3 PAIR IDC JUNCTION BOXES FOR TELEPHONE CABLE PACK OF 3 (three)
