ISDN FACILITIES

ISDN FACILITIES

 

 

GENERAL

Note: This chapter only applies to the Standard telephone.

 

This chapter is only relevant when your system is connected to

 

a digital trunk line (ISDN-trunk line). It provides a general

 

view of all the (supplementary) services available from the

 

public net which are supported by the system. The services

 

from the public net differ from market to market. Please ask

 

your system administrator which features are available.

 

 

 

NUMBER

 

 

IDENTIFICATION

The main difference compared to the analogue public net

 

is the number identification between the connected parties.

 

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431811005446 S

 

When you establish an outgoing external call, the public

 

number of your system and your extension number will be

 

sent to the caller. If the number of the answering party is

 

different from the dialled one (for example, after a diversion),

 

you will also be informed about the answering party´s number.

 

When you answer an incoming external call on your phone

 

(or from another phone), you will see the caller´s number

 

on the display. Your public number will be sent to the caller.

 

 

NUMBER SECRECY

By pressing a pre-programmed ”number secrecy” key you

 

can choose not to show your complete number

 

(public + extension number) to the connected party.

 

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DISPLAY REST

S

Number secrecy

Press a pre-programmed key to suppress

 

your complete number to the public net

 

The lamp beside the key shows a steady light and the

 

function remains activated until the key is pressed again.

49

BusinessPhone 250 / BusinessPhone 50

Standard Telephone / Economyplus Telephone

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Ericsson 250 manual Isdn Facilities General, Number Identification, Number Secrecy

250, 50 specifications

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