Siemens CX203isdn 사용자 설명서

SX303/353isdn / englisch / A31008-X353-B100-2-7619 / glossary.fm / 14.11.2005

Four-wire ISDN connection wiring. It provides two B-channels and one D-channel. 

Up to twelve ISDN outlets can be connected to it, on which up to eight terminals can 

be operated at the same time.

ISDN connection with a series of services such as call waiting, three-party 

conference, or callback on busy. See also "Comfort connection".

3PTY, three-party. Interconnection with two external users (ISDN or analogue 

network customers).

Toggling allows you to switch between two external callers without allowing the 

waiting caller to listen in.

Terminal Portability, see "Unplugging on the bus".

Answering machine feature which allows you to record a conversation during a 

phone call.

Music on hold. During an enquiry call or when a call is being transferred, a melody 

is played which the waiting person can hear.

Stops your personal phone number being transferred.