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ESN Number

An ESN number uniquely identifies each Dualcom. It is the Electronic Serial

Number. It is like the ‘chassis number’ on the metal chassis of a car.

On Dualcom Mk1, the ESN number number may be read from a label on the

outside plastic case of the unit.

On Dualcom Mk2, the ESN number number may be read from the label that is

under the internal battery. To access it, remove the battery-cover screw, lift the

tab at the front of the battery cover and lift out the battery. See Fig 2.

On Dualcom Mk2, to replace the battery, position the red and black wires in the

lid cut-out, clip the back of the battery lid onto the Dualcom, lower the lid tab

and replace the screw.

NUA Number

The NUA number identifies the user that the Dualcom is registered to. It is the

Network User Address. It is like the Registration Plate (Number Plate) on the

front and back of a car.

If one number is known then the other may be found from records at CSL or

Vodafone. These may be obtained by calling a Help Desk. See page 10.

It is strongly recommended that the Dualcom ESN & NUA numbers, security

access numbers, etc. are recorded on the site records that will be stored at

your office. See Fig 2.

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Connect Systems CS1001 Installationshandbuch Seite 17