Manuals are easily available from the distributor of Tadiran systems in your country.
In Israel is Tadiran head office (
Tadiran Telecom International - Tadiran Telecom.
In the US there is Tadiran America (
Tadiran Telecom, Inc. - Communication Solutions for Enterprise and Organizations of All Sizes).
In the UK it's Tadiran UK (
Tadiran).
In Australia it's ACC - Australian Communications Consortium (
Australian Communications Consortium - Voice and Data Networks)
In Europe/Asia there is one in German, Italy, Russia and several other countries.
Where are you?