CNI C(G)-310 User manual

C (G)-310 Main Frame Connector
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Contents
1. General ......................................... 1
2. Description .................................... 1
3. Precautions....................................1
4. Installing Stubbed Connectors.........2
5. Grounding ..................................... 3
6. Changing Stub Position...................5
7. Installing Stubless Connectors........ 6
8. Marking and Jumpering ................ 10
1. General
1.1 The C(G)-310 connector (Figure 1) is a 100-
pair unit used for terminating outside plant (OP)
cables in central office where current and voltage
protection is required.
Note:
The connector can be used without
protection if only cable termination is desired.
1.2 Two types of installation procedures are
provided in the following paragraphs. The first
procedure addresses stubbed connectors; the
second addresses stubless connectors.
2. Description
2.1 The C(G)–310 connector consists of a
connector base designed for installation on a main
distributing frame (MDF) and protector modules
that plug into the base. The C(G)–310 connector
provides features for testing, identification of
incoming circuits, and disconnection of outside
cable pairs in addition to current and voltage
protection through the use of various types of
protector modules. The 100-pair capacity
connector is available with or without a cable stub.
2.2 The C(G)–310 connector is available with
tin-alloy-plated protector receptacles.
3. Precautions
3.1 Store the C(G)–310 connector and modules
in a dry location. Do not leave the units on the
loading docks or in outside locations where they
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may be exposed to the weather. When unpacking
the connector from its shipping carton, use care so
as not to damage the connectors or stub.
Caution: To avoid damage–do not bend the
cable stub in a short radius.
Note: Do not remove the connector from its
protective carton until it is ready for installation on
the frame.
3.2 If protector modules have been installed in
the connector, they should remain in the detent
position. It is not necessary to remove the
protector modules before installing the connector
on the frame.
4. Installing Stubbed Connectors
4.1 Prior to installing the C(G)–310 connector,
open the cable entrance slots or ferrules in the
floor in accordance with local practices. (For
overhead cable, follow the instructions given in
Section 6 for Changing Stub Position.) If there are
fanning strips on the frame vertical, remove them.
The C(G)–310 connector fanning strip is an
integral part of the connector panel. Mark the
cable number and pair count of each connector
stub cable and attach to the stub cable prior to
placing it through the floor to the vault.
4.2 Remove the connector from the shipping
carton and route the stub cable into the cable vault
from in front of the vertical side of the distributing
frame. Remove any cable twist that might be
present.
4.3 Attach the C(G)–310 connectors to the left
side of the distributing frame vertical mounting bar,
beginning at the lower end of the frame (Figures 2
and 3). Use the 1/4-20 mounting screws furnished
with the connectors. Place the top screw in the
vertical mounting bar on the MDF. Hang the
connector on this screw using the keyhole slot on
the C(G)–310 mounting bracket. Now install the
lower screw into the bracket and frame and tighten
both screws.

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5. Grounding
5.1 Three methods may be used to connect the C–
310 connector to electrical ground. The connector
ground wiring is terminated at a no. 10 ground
screw terminal on the rear of the connector base
(Figure 4). This ground screw is jumpered to the
lower portion of the connector mounting bracket
through a short (3-1/2-inch) ground strap. The
grounding methods are described in the following
paragraphs.
5.2 Basic grounding method: Use the 7 3/4-
inch interconnector ground strap supplied with the
unit to connect the 1/4-20 mounting screws on
adjacent connectors (see I Basic, Figure 5).
Repeat this procedure for each pair of connectors
on the same vertical. Connect the bottom 1/4-20
mounting screw on the lowest connector to a 1/4-
20 terminal on the main frame copper ground bar
using the long (26 1/2- inch) ground strap.
5.3 Independent ground method: Use the
interconnector ground strap (17 1/2 inches long) to
connect the no. 10 ground screw terminals of each
pair of adjacent connector bases on the same
vertical (see II Independent, Figure 5 ). Connect
the no. 10 ground screw ground terminal on the
lowest connector to the 1/4-20 terminal on the
main frame copper ground bar using the long (28-
inch) ground strap.
5.4 Isolated ground method: Remove the short
(3 1/2-inch) ground strap from the no. 10 screw
ground terminal and the connector mounting
bracket. Use the interconnector ground strap (17
1/2-inch) to connect the no. 10 screw ground
terminals of each pair of adjacent connector bases
on the same vertical (see III Isolated, Figure 5).
Connect the no. 10 screw ground terminal on the
lowest connector to the 1/4 -20 terminal on the
main frame copper ground bar using the long
(28-inch) ground strap.
Note: The long ground straps, 26 1/2-inch and 28-
inch, and the interconnector ground strap, 17 1/2-
inch, are accessory items and must be ordered
separately.
5.5 Tighten all mounting screws after all of the
connectors and ground straps are placed in
position on the vertical mounting bar.
5.6 The clamps on the pressure plug of the
connector stub should be carefully bent to the
vertical mounting bar, so the stub cable will be out
of the way for future work at the frame (Figure 6).
5.7 The stub cables of all connectors on a
vertical mounting bar should be neatly arranged
against the transverse arms of the frame. Lash the
stub to these transverse arms in a neat manner.
5.8 Close the cable entrance slots, or ferrules, in
the floor, in accordance with local instructions.

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6. Changing Stub Position
6.1 The cable stub may be turned 180 degrees
(Figure 6). Handle the cable very carefully to avoid
breaking wires. Be sure that enough clearance is
available for the molded end of the cable stub
above the top of the connector base before using
this method.
6.1.2 Remove cable clamps from pressure plug
and mounting bar.
6.1.3 Turn cable stub 180 degrees.
6.1.4 Reinstall cable clamps in the alternate holes
provided.
6.2 Splice the cable stub to the entrance cable.
The cable is wired with standard cable wire color
coding. Cable pairs can be matched to the central
office jumper field as shown in Table 1.

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7. Installing Stubless Connectors
7.1 Attach the C–310 connectors to the left side
of the distributing frame vertical mounting bar,
beginning at the lower end of the frame (Figures 2
and 3). Use the 1/4-20 mounting screws furnished
with the connectors. Place the top screw in the
vertical mounting bar on the MDF. Hang the
connector on this screw using the keyhole slot on
the C–310 mounting bracket. Now install the lower
screw into the bracket and frame and tighten both
screws.
7.2 Temporary Mounting
7.2.1 Remove the four (4) 8-32 screws holding the
plastic base to the mounting bracket (Figure 7).
Set the base aside and save screws.
7.2.2 Mount the temporary mounting brackets to
the mounting bracket on the frame by using the
four (4) 8-32 screws provided. Use the small
temporary mounting bracket on top and the large
temporary mounting bracket on bottom (Figure 7).
7.2.4 Attach plastic connector to temporary
mounting bracket with the screws saved from step
7.2.1.
7.3. Wiring
7.3.1 Figure 8, “A” application, describes hard
wiring central office equipment to connector
central office terminals for outside plant cable
cross-connected at a jumper field.
7.3.2 Figure 9, “B” application, describes central
office equipment cross-connected at jumper field
for outside plant cable hard wired at test field or to
connector outside plant terminals.
7.3.3 Refer to the wiring diagram table (Figure 10)
and Figure 11 to stub connector.

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7.4 When wiring has been completed, remove
the temporary mounting brackets and reassemble
the connector base to its regular mounting bracket.
Be sure to reconnect the short ground strap between
the no. 10 screw ground terminal on the connector base,
and the screw on the mounting bracket (Figure 4).
7.5 After the connector has been stubbed,
complete the installation by following the
instructions for grounding, splicing, and changing
stub positions given in Sections 5 and 6.
NOTES:
1. Test Field - 100 Tip/Ring pair test receptacles, 50 at
top and 50 at the bottom of the connector base.
2. Connector Field - Receptacles for 100 connector
modules.
3. Jumper Field - 100 Tip/Ring pair wire-wrap terminals
adjacent to integral fanning strip.
8. Marking and Jumpering
8.1 Test fields: Each connector panel test field
is permanently pre-marked in black numbers in
increments of five pairs (Figure 12). Each pair of
test contacts has tip-left and ring-right. A space is
provided immediately above the bottom test field
to mark the cable number and pair count (Figure
12).

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8.2 Jumper field: The connector panel is
permanently pre-marked in black numbers, with a
vertical black dividing line, adjacent to every 10
pairs of wire-wrap terminals on the right face of
the panel, to assist in quick pair identification
when placing CO jumpers (Figure 12).
8.3 Fanning strip: The fanning strip with holes
for entrance of the CO jumpers is on the front of
the panel immediately to the right of the wire-wrap
terminals. Each group of 10 cable pairs has two
large fanning strip holes to facilitate access of the
jumper wires from line terminal blocks to the
connector wire-wrap terminals (Figure 13). The
side of the fanning strip is also marked for 10
pairs.
8.4 Connection of Central Office to Outside
Plant: All that is required to make the final
connection is to push each protector module from the
detent position to the fully inserted position. The
outside plant and central office equipment are then
connected.

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