Merlin 3070 Service And Maintenance Manual page 13

LINE MODULE
The Line Module, color-coded green, occupies position 7. Additional Line Modules (up to five)
can occupy position 8 in the control unit and positions 17, 18, 19, and 20 in the expansion
unit. Line Module positions are labeled on the colored bands on the control unit and the
expansion unit with the letters A through F in addition to position numbers 7, 8, 17, 18, 19,
and 20. Each Line Module provides connections for five outside lines via modular jacks
labeled 0 through 4. Both the module and the jack to which a line connects determine the line
designation: The designation is the letter label of the module position plus the number of the
jack on that module to which the line connects. For example, the line plugged into the third
jack on the module in position 8 (labeled Lines B0 to B4) is designated B2.
Jacks numbered 0 through 4 provide
connection to outside lines.
CIB 3014
11