ADTRAN 1248 Especificaciones descargar pdf (Pagina 2)

2 61179641L4-22A

2. Tighten the screws (normally provided with each

amphenol connector attached to the cable) on the

right side of each amphenol connector, and use the

cable ties (provided) threaded through the tie-down

brackets (provided) to secure the left side of the

amphenol connectors.

NOTE

♦ This cable tie may be used to assist in routing the power

cables and the ADSL+POTS cables that originate from

the right most amphenol connector.

♦ The POTS interface may be connected to the outside

plant.

Customer Connections (ADSL+POTS )

The Total Access 1248 provides 48 ADSL+POTS ports on two

50-pin male amphenol connectors. POTS is brought in from

the CO on the POTS amphenol connectors as described in the

preceding section. The ADSL is generated locally and placed

on the same pair as the corresponding POTS signal for delivery

to the subscriber.

There is a one-to-one correlation between the pins on the

ADSL+POTS amphenol connectors and the pins on the POTS

amphenol connectors.The 25th pair is not used. To establish

the ADSL+POTS connection, perform the following steps:

1. Connect the 25-pair female amphenol connectors to the

male amphenol connectors provided, labeled

ADSL+POTS.

2. Tighten the screws (normally provided with each

amphenol connector attached to the cable) on the

right side of each amphenol connector, and use the

cable ties (provided) threaded through the tie-down

brackets (provided) to secure the left side of the

amphenol connectors.

FRONT PANEL LEDS

The Total Access 1248 provides front panel LEDs to reflect the

condition of the hardware. The table below lists the LEDs and

their status.

Label Status Description

PWR

{

Green

Yellow

Red

Off

Total Access 1248 is In Service

Total Access 1248 is Out of Service-

Maintenance

Total Access 1248 Failed self-test

No power present on Total Access 1248

ALM

{

Yellow

Red

Off

Total Access 1248 is reporting a Minor

alarm

Total Access 1248 is reporting a Major

alarm

No alarms reported on Total Access

1248

EXPANSION

Green

Flashing

Yellow

Connected to an upstream box

Connected with traffic

No signal

EXPANSION

OUT

Green

Flashing

Yellow

Connected to a downstream box

Connected with traffic

No signal

To connect the power source, perform the following steps:

1. With the power disconnected at the source, remove

approximately 1/4 inch of insulation from the ends of

the power wire.

NOTE

ADTRAN recommends an external fuse rated at 3.0 amps.

2. Using a small flat-head screwdriver, loosen the

setscrew on the top of the terminal block.

3. Insert the bare wire into the opening on the front of

the terminal block, making sure that the wire is

inserted correctly according to the labeling on the unit

above the terminal block.

4. While holding the wire in place, tighten the setscrew

until the wire is secure.

5. Repeat steps 1 to 4 until all power leads are

connected.

6. Apply power to the Total Access 1248 and test the

voltage and polarity on the terminal block using the

tops of the setscrews as test points.

ETHERNET CONNECTION

The Total Access 1248 interfaces with networks for

management through an Ethernet port. The following Ethernet

protocols are supported:

♦ IEEE 802.3, 10/100Base-T

♦ DHCP Client Mode for Management

♦ SNMP

ALARM CONNECTIONS

The Total Access 1248 provides an alarm port with three

auxiliary alarm inputs and three alarm outputs (Major, Minor,

and Critical). Alarm inputs are activated by shorting A and B

contacts (closing an externally connected relay). The outputs

provide both normally open and normally closed pins (through

internal relay contacts) for proper operation with a variety of

alarm panels. Each alarm event generates an autonomous TL1

message that is transmitted via the in-band management

channel to a monitoring device.

A cable with a high density DB-15 male connector on one end

and a stub at the other end is available (P/N 1196DB901L1)

for wire-wrap connections to an alarm panel.

NETWORK CONNECTIONS

Network connections are accomplished via the 50-pin

amphenol connector labeled

T1/E1 1-8.

ADSL2+ and POTS Connections

The Total Access 1248 uses four 25-pair amphenol

connectors which are used as follows:

♦ Two are for connection to the POTS pairs

♦ Two are for connection to the ADSL2+ plus POTS pairs

POTS Connections

To establish a POTS connection, perform the following steps:

1. Connect the cables with the 25-pair female amphenol

connectors to the male amphenol connectors provided,

labeled

POTS.

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