Nortel Networks DCT1900 - Manual (Page 23)

Technical Product Manual - DCT1900
System Description, System Overview
System-DCT1900/R8/mw 2-1
© 2000-2005
C HAPTER 2
System Overview
The DCT1900 system may operate as a standalone system or as a mobility system when used in
conjunction with the Mobility Server. Figures 2-1 and 2-2 show an overview of the environments in which
the DCT1900 system may be applied.
The DCT1900 Standalone configuration consists of a single RE and its associated Base Stations con-
nected to a PBX. In the standalone configuration the RE will connect towards the telephone network with
either analog type trunks or a T1/E1 channel associated signalling trunk. The DLU provides an intelligent
interface between the Freeset and a proprietary digital PBX. The DLU emulates a digital phone set of the
PBX and allows Freeset users to take advantage of digital phone set features. A DCT1900 Standalone
configuration provides for wireless phone service in a simple and cost efficient manner.
Digital Phone Set Features
The DLU supports the following digital phone set features to the Freeset DCT1900 DT620 and
9p23 Portable Telephones:
• Multiple Line Appearance
• Caller Line Identity
• Connected Line Identity
• Redirected Party Number
• Message Waiting Indication
• Transfer
• Conference
• Hold
• Reconnect
• Call Back
• Cancel Call Back
The DCT1900 Mobility configuration provides for one or more REs connected to a Mobility Server, which
will then connect towards the telephone network. Large integrated networks of DCT1900 Portable
Telephones can be built up using multiple REs and one or more Mobility Servers. The Mobility Server(s)
provide the capability of intersystem handovers and roaming. In the case of an intersystem handover, a
Portable Telephone user can be on a call while moving from the radio coverage area of one RE to the radio
coverage area of another RE without any disruption to the call. In the case of roaming in a DCT1900
Mobility configuration, a Portable Telephone can originate or accept a call in the radio coverage area of any
RE. Additional features that the DCT1900 Mobility configuration may support when combined with a
compatible PBX are Calling Line ID type displays and message indicators.
DCT1900 features such as phone authentication, encryption, and handover between Base Stations on the
same RE apply to either the DCT1900 Standalone configuration or the DCT1900 Mobility configuration.
The signalling interfaces that the RE presents towards the phone network are different in the case of a
DCT1900 Standalone and a DCT1900 Mobility configuration. Table 2-1 summarizes the signalling
differences between the two configurations.