57

Working with the Power Supply Unit

The iPSU needs no scheduled maintenance other than regular battery inspection and replacement. If the

power supply unit is equipped with a backup battery, it continues to provide voice-over-IP services in case of

emergency during a power outage. During a temporary AC power outage, the power source is switched to

the battery without interruption of the voice-over-IP service. When the AC power is restored, the power

source is switched back to the power supply unit. The switchover between the power supply unit and the

battery is automatic and instantaneous.

This section provides instructions to:

•

Replace the battery on

page 58

•

Disable the audio alert on

page 61

•

Enable the audio alert on

page 63

Note:

Reserve the battery charge during a power outage. Do not access the

Internet when the power is running on the battery. Doing so will discharge the

battery at a much faster rate and shorten the voice-over-IP service time.

Note:

You are solely responsible for periodically replacing this battery to

provide uninterruptable voice-over-IP services during a power outage. Your

service provide does not monitor the battery and is not responsible for its

replacement.

iNID -- i3812V User Guide

58

Replacing the Battery

The battery is rated for a service life of up to five years, which varies depending on operational and

environmental conditions. The battery life expectancy depends on the operating environment as

temperature extremes shorten the battery life. The optimum operating temperature is between

–5

o

C to +50

o

C, ambient (23.0

o

F to 122

o

F).

The battery is specifically designed to use with the iNID system. Contact your service provider for battery

replacement information.

To replace the battery:

1.

Use a Phillips screwdriver to unfasten two screws (one on each side) securing the power supply battery

cover, and put them in a safe place (

Figure 11

).

Figure 11: Power Supply Unit Cover Removal

2.

Bring the battery cable and battery cable connector to visibility (located on top of the backup battery).

3.

Press down on the tension springs and pull to disconnect the battery cable connector from the battery

cable (

Figure 12

).

Remove screws from both sides of

the unit to remove the front cover.

Working with the Power Supply Unit

59

Figure 12: Battery Connector

4.

Release the safety strap securing the battery.

5.

Remove the old battery from the housing and put it safely aside.

6.

Insert the new battery gently into the housing.

7.

Connect the battery cable connector to the battery cable.

8.

Observe the

BATTERY

indicator on the iPSU, it should light green when the i38HG and i3812V are

communicating properly.

9.

Secure the battery with the safety strap.

Note:

Be careful when removing the battery; it is heavy.

Note:

Be sure to place the battery inside the raised bottom edge of the

case.

Note:

A faulty battery is indicated if the

BATTERY

indicator does not light

green within 5 minutes assuming the iPSU is plugged into AC power.

POWER

SILENCE ALARM

Tension Springs

iNID -- i3812V User Guide

60

10.

Place the housing cover over the unit and press gently on it until it snaps into place.

11.

Fasten the cover with the two screws you removed earlier.

Note:

If you have disabled the alert earlier, make sure to enable the alert

(

page 63

).

Working with the Power Supply Unit

61

Disabling the Alert

By default, the audible alert is enabled to warn you when the battery is exhausted. It is recommended that

you do not disable the audible alert unless you intend to replace the battery within a short time. A chirping

tone sounds to alert you that when the battery is exhausted and needs replacing. The duration of the

chirping sound is 0.2 seconds and happens once every 5 seconds. You can turn off the chirping sound to

disable the alert for 12 hours or permanently.

To disable the alert:

1.

Enter

as the URL; the

Home

page opens.

Caution:

Disable the audio alert with caution!

If you disabled the alert and did not replace the backup battery on a timely

manner, you will have no voice-over-IP services in case of emergency during

an AC power outage.