the TCF. Rerouting of the multiplexed groups is readi-
ly accomplished at this central point by patching.
(2) Voice Frequency Channel Interface. The multi-
plex channel modems are wired to the Equal Level
Patch bays in the VF Technical Control area. The
patching facilities in this area provide access to the cir-
(3) DC Circuit Interface. In the TCF DC area,
patching access is provided to DC subscriber loops and
VFCT circuits by the DC patch facilities.
b. Monitoring and Testing Functions.
(1) Monitor and Test Point Interface. All VF and
Effective control of that
DC jacksets include a monitor jack appearance. These
comes under the responsi
jacks are arranged to permit monitoring and testing
Facility requires format
without interrupting the circuit.
(2) Teat Bay Interface. The test bays contain
transmission measuring equipment and other test
item to facilitate maintenance, fault isolation, analy-
sis, and correction.
c. Status Reporting and Coordination Functions.
Operating personnel at the station are the primary
users of the supervisory Subsystem which provides
orderwire communications. This subsystem provides
communications with other stations as required. Re-
porting requirements are established by the station
a. General. The principal functions of the Technical
controller are to moni
d patch, as required,
4-6. Orderwire Procedures