Equipment Cable ADIX Digital Key Telephones: 1-pair (twisted) #22/24 AWG ADIX Digital KT’s used with IX-BPAD or ADIX Data Modules: 2-pair (twisted) #22/24 AWG ADIX Direct Station Selection Units: 1-pair (twisted) #22/24 AWG ZT-D Key Telephones: 2-pair (twisted) #22/24 AWG ZT-D KT’s equipped for off-hook voice announce and hands- free answerback: 3-pair (twisted) #22/24 AWG Single-Line Telephones (500/2500 type): 1-pair (twisted or quad) #24 AWG