Teledex Y Series User Manual download pdf (Page 25)

Y SERIES EXP212, EXP224, AND EXP248 USER GUIDE www.teledex.com 25

Also keep each EXP212, EXP224, and EXP248

system site free of dust and other pollutant that

could affect system performance. In addition,

be sure to maintain the environment conditions

at the central office and at each remote system

site. The ideal operating temperature is about

20°C. The following is the acceptable operating

condition range:

• –10°Cto65°Cand0%to95%humidityat35°C

2.2 Powering the EXP212,

EXP224, or EXP248 Up or Down

This section describes how to power up and

power down the DSLAM.

Table 2.2 Procedures of Powering Up the

DSLAM

Step Action

1 Put on the anti-static wrist strap and

connect it to a grounding point.

2 Ensure that the DSLAM is securely

installed.

3 Ensure that the DSLAM ground strap is

connected to a suitable ground point.

4 Ensure that –48 Vdc power is being

supplied to the DSLAM. For EXP212 and

EXP224: If you use AC power, ensure the

AC power is being supplied.

5 Ensure that the fan card is installed

(EXP248 only).

6 Ensure that the POTS lines, subscriber

lines, and alarm equipment are

connected.

7 Slide the power switch on the faceplate

to ON (EXP248 only).

8 Wait for a minute, and then check the

LEDs on the DSLAM. If the LEDs show

some problem, refer to section 3.2 for

information on how to resolve problems

indicated through LEDs.

Table 2.3 Procedures of Powering Down the

DSLAM

Step Action

Caution: Powering down the DSLAM stops DSL

service to subscribers. POTS service is not

affected.

1 Put on the anti-static wrist strap and

connect it to a grounding point.

2 Slide the power switch on the faceplate

to Off (EXP248 only).

3 Disconnect the AC power cord from

the AC supply socket on the front panel

(EXP212 and EXP224).

2.3 Controls and LED Indication

The EXP212, EXP224, and EXP248 have simple

controls and indicators on its front panel.

The indicators show the current operating

states of various system elements and serve

as maintenance aids for local technicians at

each site. The remaining controls on the cards

are also provided for local system testing and

maintenance.

Table 2.4 EXP224 and EXP248 Controls and LED

Indication

EXP224 Front Panel

EXP248 Front Panel

LED Color

Indication/

Condition

SYS Yellow At power on

phase

Red Self-test fail

Green Normal

operation

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