System Guide

SME VOIP SYSTEM GUIDE 4.7 11 | P a g e
Proprietary and Confidential
2.2 Components of SME VoIP System
RTX SME VoIP system is made up of (but not limited to) the following components:
• At least one RTX Base Station is connected over an IP network and using DECT as air-core interface.
• RTX IP DECT wireless Handset.
• RTX SME VoIP Configuration Interface; is a management interface for SME VoIP Wireless Solution. It runs on all IP
DECT Base stations. Each Base station has its own unique settings.
2.2.1 RTX Base Stations
The Base Station converts IP protocol to DECT protocol and transmits the traffic to and from the end-nodes (i.e.
wireless handsets) over a channel. It has 12 available channels.
In a dual-cell setup, each base station has:
• 8 channels that have associated DSP resources for media streams.
• The remaining 4 channels are reserved for control signaling between IP Base Stations and the SIP/DECT end nodes
(or phones).
If two Base Stations are used, they are grouped into a cluster. Within the Cluster, Base Stations are synchronized to
enable a seamless handover when a user moves from one base station coverage to the other. It is necessary for Base
Stations to communicate directly with each other in the system in order to guarantee synchronization in the situation
that one of them fails.
The 4 control signaling channels are used to carry bearer signals that enable a handset to initiate a handover process.
2.2.2 SME VoIP Administration Server/Software
This server is referred to as SME VoIP Configuration Interface.
The SME VoIP Configuration Interface is a web-based administration page used for configuration and programming of
the base station and relevant network end-nodes. E.g. handsets can be registered or de-registered from the system
using this interface.
The configuration interface can be used as a setup tool for software or firmware download to base stations, repeaters
and handsets. Further, it is used to check relevant system logs that can be useful to administrator. These logs can be
used to troubleshoot the system when the system faces unforeseen operational issues.
2.2.3 RTX Wireless Handset
The handset is a lightweight, ergonomically, and portable unit compatible with Wideband Audio (G.722), DECT, GAP
standard, CAT-iq audio compliant.
The handset includes color display with graphical user interface. It can also provide the subscriber with most of the
features available for a wired phone, in addition to its roaming and handover capabilities. Refer to the relevant
handset manuals for full details handset features.
2.3 Wireless Bands
The bands supported in the SME VoIP are summarized as follows:
Frequency bands:
1880 – 1930 MHz (DECT)
1880 – 1900 MHz (10 carriers) Europe/ETSI
1910 – 1930 MHz (10 carriers) LATAM
1920 – 1930 MHz (5 carriers) US
Transmit Power: 23.7 dBm in Europe mode.