ADTRAN 1500 Spezifikationen PDF herunterladen (Seite 7)

7 61180001L1-5B Section 61180001L1-5 Issue 2

Up to 14 dual LIU systems or 28 single LIU systems

may be daisy chained to a single output from the

timing source, so only one wire run is required from

the timing source for an installation of up to 14 or 28

Total Access 1500 shelves. Use wire of the same type

as was used for the wire run from the CO clock source

to the Total Access 1500 shelf. The following steps

provide instructions for connecting up to 14 or 28

Total Access 1500 shelves to a single external timing

source.

1. Determine the length of wire required to run from

the first shelf, connector P14, to the second shelf,

connector P14, which is to be wired in the same

daisy chain. Leave approximately 1 to 1 1/2

inches for wire-wrapping.

2. Using wire strippers, strip approximately 1 to 1

1/2 inches from both ends of the wire run.

3. Using a wire-wrap tool, wire-wrap the “+”, “–“

and drain wires to the “+”, “–” and ground

terminal pins of connector P14, CLK-OUT, on

the top of the backplane.

4. Run the wire from P14 on the “source” shelf to

connector P14, CLK IN, on the receiving shelf

(See Figure 4).

5. Wire-wrap the “+”, “–“ of the wire run to the “+”,

“–“ terminals of P14 on the receiving shelf.

6. At SW1 of the receiving shelf, mounted to the left

of P14, move the switch right to the “OUT”

position.

7. Repeat steps 1-6 for each Total Access 1500 shelf

that is to be interconnected on the single CO

timing source.

NOTE

In any daisy chain of Total Access 1500 shelves

using a single timing source, only the first shelf

in the chain should have the SW1 switch set to “

IN.” All the remaining shelves in the chain

should have SW1 set to “OUT.”

Wiring Test Access

A four-lead (T, R, I, and drain) common test access

bus is provided for metallic test access to all customer

loops and is labeled P6 on the backplane. If the Total

Access 1500 being installed will use these testing

features, wiring will be required to gain access to the

test leads.

Connect MLT

Metallic Loop test access is gained by wiring into the

connector P6, on the right side of the backplane.

The following steps are instructions for wiring the

Total Access 1500 for Metallic Loop test access.

1. After you have located the test loops and run them

to the Total Access 1500 shelf, use wire strippers

to strip approximately 1 to 1 1/2 inches from the

test leads.

2. Using the wire-wrap tool, wire-wrap the central

office “T” and “R” leads to the Total Access 1500

“R” and “T” pins, respectively, on terminal P6.

3. Wire-wrap the inhibit wire of the cable to the top

pin labeled “I” on P6.

4. Wire-wrap the drain wire of the cable to the

bottom pin labeled ground on P6.

5. Neatly tie down the test cable pair.

Alarm Connections

Alarming is dependent on how the Total Access 1500

system is configured. When the Total Access 1500 is

configured as a channel bank using a single or dual T1

feed, the alarm outputs should be represented by

VMJ(Visual Major), VMN(Visual Minor),

AMJ(Audible Major), AMN(Audible Minor),

AUX(Auxiliary) and -48. However, if the Total

Access 1500 bank is configured as a DLC using quad

T1 feed, the alarm outputs should be represented by

T1A(A Digroup Major), T1B(B Digroup Major),

T1C(C Digroup Major), T1D(D Digroup Major),

BANK(Bank System Major), and -48. In the DLC

mode, the Total Access 1500 separately monitors the

performance of each digroup (A, B, C and D) and the

bank. The DLC mode assures that an alarm at the

digroup level provides appropriate central office and

remote information.

The Total Access 1500 provides standard bank alarm

outputs. Each of the alarms listed below consists of a

three-pin wire-wrap header that connects to the SCU

for alarm management. The SCU provides the

necessary electronic circuits for a NO/COM/NC

contact arrangement. The alarms are:

• Major-Visual Output

• Minor-Visual Output

• Major-Audible Output

• Minor-Audible Output

• AUX Output

• ACO Alarm Input

The alarming configuration is selected as an LIU

option through the VT100 craft interface.

1 2 3 4 5 6 7 8 9 10 11 12

Kommentare zu diesen Handbüchern

Keine Kommentare

ADTRAN 1500 Spezifikationen Seite 7

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Vernetzung ADTRAN 1500