When the system is installed, you need to make sure that only the lines equipped are in the access plan (program 400 in a TA series box). When you go to the intercom on a phone and dial "9" you should get an outside line every time. If that works, system and personal speed dials include that access code as part of the number. eg my test number is 914197845522 9+1+10 digits.
Carl
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