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EXTENDING THE
NETWORK
INTERFACE TO A
JACK FIELD FOR
OUTSIDE LINES
If the local telephone company has provided an RJ2l-type
network interface, you can connect the control unit to the
network interface using adapters that allow you to plug
D2R cords directly into the interface. You can also extend
the network interface to a group of single-pair modular
jacks mounted in an apparatus box in a jack field. Then
you can connect the control unit to the outside lines by
plugging the modular line cords into these jacks. See
Figure 2-2 on page 2-13.
You need the following items to extend the network
interface to the jack field:
●
●
●
4-line adapters.
Some examples of 4-line adapters are
the following:
> The Z609A adapter splits four pairs from one
8-conductor modular jack to one pair in each of
four 2-conductor modular jacks. All jacks are
8-position modular jacks.
> The Z610A adapter provides up to four single-pair
jacks for the MERLIN II system control unit. This
adapter consists of a no-type insulation
displacement connector wired to four 6-position
2-conductor modular jacks.
Z122C apparatus boxes.
Each box holds two 4-line
adapters.
Single-ended 25-pair connectorized cable.
This
cable must be long enough to reach from the network
interface to the jack field with some slack. Before you
order this cable, check to see whether the 50-pin
connector at the network interface is male or female
and order cable with a 50-pin connector of the opposite
gender.
Wiring the System 2-41