Siemens GIGASET SX255 - Manual (Page 44)

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ISDN glossary
Gigaset SX205-255i / englisch / A31008-X255-B100-1-7619 / glossary.fm / 09.10.2003
D
D channel
Control channel for an ISDN connection. See "Channel"
Digital exchange
Computer controlled switching units allow quick connection and the activation of
such additional services as => enquiry calls, => call waiting, => three-way confer-
ence, => call forwarding etc.
Direct call
Block the telephone for all phone numbers except for an individually entered
number. After picking up the handset and pressing any key, the connection to the
saved phone number is established. Ideal for children who cannot yet dial phone
numbers (baby call). Calling an emergency number is always possible. This function
is available on the Gigaset 3000/2000 Comfort handsets.
E
ECT (Explicit Call Transfer)
See "Call transfer"
Electronic code lock
Personal code (=> PIN), used, for example, to protect a phone against unauthorised
use – only calls to emergency numbers may still be made. Incoming calls may be
accepted.
Enquiry calls
You are making a call. Using the "Enquiry call" function, you interrupt the conversa-
tion briefly to establish a second internal or external connection to another user. If
you terminate the connection to this user immediately, then this was an enquiry call.
If you switch to and fro between the first and second user, it is called toggling.
Exchange
Nodal point in the public telephone network. A distinction is made, for example,
between local exchanges and long-distance or trunk exchanges.
H
Handsfree
A phone's handsfree set not only permits open listening but also allows you to talk
to the person on the other end without lifting the receiver by means of an integrated
microphone. This means others present in the room can also participate in the con-
versation.
Hold
(Hold the line). Interrupts and re-instates an existing connection. In particular, it per-
mits enquiry calls and toggling between calls.