Honeywell 66 Configuration Manuals page 167

SECTION XVIII
Configuring Original DN66l6/6624/6632 FNPs
b. LEF schematics -
1-6 modems or 1—24 current
level lines
ACB or GPCB
For 1—4 synchronous or
asynchronous lines, with/without
supervisory channels. Lines
switched between 1—4 modems and
2 communications bases
162
For 1-4 synchronous or
asynchronous lines with/without
supervisory channels. Lines
switched between 2 sets of
modems and a communications base
DH92. Rev. 0