CSL DualCom GSM Mk1 Installation Manual page 45

Glossary of Terms (continued)
ISDN Integrated Services Digital Network
A digital communication network where services are provided via electrical
or optical cables. This may also be a digital PSTN. The network is usually
provided as a 2 channel or 30 channel ISDN service.
ISDN 2 2 Channel ISDN
An ISDN communication service where two simultaneous channels may be
used. Each channel is normally a 64 KiloBit/sec serial data path. Each path
may typically carry one speech telephone call, or an internet connection or
a fax call.
ISDN 30 30 Channel ISDN
An ISDN communication service where thirty simultaneous channels may
be used. Each channel is normally a 64 KiloBit/sec serial data path. Each
path may typically carry one speech telephone call, or an internet connec-
tion or a fax call.
NTP Network Termination Point
A telephone line is terminated at the users premises by a Network Termina-
tion Point which is provided by the Telecomms Service Provider. This is a
socket or connection where the users equipment can be connected.
NVM Non Volatile Memory.
An integrated circuit memory device that does not need any power to re-
member data.
PABX Private Automatic Branch Exchange
A small telephone exchange for use within one building or group of build-
ings. Commonly used in businesses where each phone in that business is
an extention on that PABX. Usually connects to one or more analogue PSTN
or ISDN telephone lines.
PSTN Public Switched Telephone Network.
A national telephone system. This may be analogue and/or digital. See
Analog PSTN.
SMS The GSM Short Message Service.
Service provided by companies supplying a GSM communications system
where a short text message may be sent to (and from) GSM mobile phones
and read on the GSM mobile phone display.
APPENDIX 5
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