Telephone Features - Lucent Technologies Index User Manual

Page 4 - Telephone Features

Telephone Features

Which Telephone Can You Use?
MF - Alias:
- DTMF
- Tone dialling
LD - Alias:
- Loop disconnect
REN - Alias:
- Ringer equivalence
number
INDeX Standard Telephone User's Guide
The standard phone must meet the requirements listed below. You must also
only use it in the phone socket indicated by your System Manager. Standard
phones will not work in INDeX feature phone sockets and vice versa.
MF or LD Dialling
Phones use either LD or MF dialling. Each time you dial a number, MF
dialling sends a pair of tones whilst LD dialling sends a series of clicks.
To enable you to use INDeX features, your Standard Telephone must be set
to MF. Standard Telephone set to MF have
key (sometimes just marked R). These keys allow you to use more of the
system's features. MF dialling also provides quicker dialling and call setup
both on the system and on the public phone network.
Many modern phones can switch to either mode. Refer to the phone
manufacturer's instruction for details of how to switch the phone between LD
and MF.
Time Break Recall
During a call, phones use a recall signal to indicate to the exchange that they
are about to send more digits. MF phones use either Time Break Recall (TBR)
or Earth Recall (ER). For an MF phone's RECALL key to work on the INDeX
system, it must use TBR. Refer to the phone manufacturer's instructions to
see how to set it to TBR.
Sharing Sockets
All standard telephone devices have a REN value. This value is a measure of
how much current they need to ring and operate properly when a call arrives.
INDeX standard telephone sockets provide a REN of 2. Thus you can share
the socket between several standard telephone devices (e.g. a phone and an
answer machine) so long as their total REN does not exceed 2
and # keys, plus a RECALL
38GDE00001SAD - Issue 8 January 2000