Operating instructions

TransTel Model TD-824-I Digital Telephone System - General Description - Installation - Programming Forms Manual
Page 32 Version 1.3b October 2005
Includes all versions through G1-a20x
Access Control Phone (ACP) and Digital Doorphone Unit (DDU)
• Single Pair Wiring is required for connection to ACP/DDU phone.
• ACP/DDU Phone can be used on a digital pair with another ACP/DDU or a DK-1 telephone set.
• ACP/DDU can be either 1
st
or 2
nd
station on circuit.