User's Manual

SME VoIP System Guide, Version 1.5
Proprietary and Confidential
Chapter: SME VoIP Network Planning/Optimization
23
Multi-cell Setup: Max ## of Users
8
Max ## Simultaneous Calls (Single Cell)
10 per Base station
Max ## Simultaneous Calls (Multi-cell Setup)
8x40=320 call sessions
4.5 Network Dimensioning
After the network requirements are clearly defined, the number of users that are expected to use the
network must be estimated. Based on that, you should estimate and identify the number and type of
equipments required in order to cater for the capacity, coverage and quality requirements. The more
accurate the dimensioning, the more efficient the network rollout.
Handsets/SIP End-Nodes:
In a typical setup, the system can support up to 200 handsets depending on the configuration.
Base stations/Repeaters:
The system can easily scale up to 40 base stations. Depending on the network setup, coverage can be
extended by up to 5 repeaters. The planner should bear in mind that base stations can support 10
simultaneously call sessions while repeaters can support 5 call sessions.
Core Network Equipments:
These equipments are at the premises of the service operator or data center. Depending on the network
requirements the following devices should be available:
VLAN/NAT aware router(s), Session Border Controller, DHCP/TFTP/FTP Servers, STUN Server, Media Server,
Access Gateway, SIP Server, etc.
4.6 Environmental Considerations
In this section, we enumerate some environmental conditions that need to be considered prior to planning,
deployment and optimisation of the SME network. The considerations are as follows:
• Ensure that the installation area is clean, dry, and protected from weather extremes.
• Ensure that the floor of the installation area is finished with linoleum, vinyl, ceramic, wooden flooring,
computer floor tiles, or polished sealed concrete.
• Ensure that the ceiling of the installation area is finished or treated to prevent particle discharge.
• Ensure that the installation area is well lit, and that the light source is uniformly diffused without
shadows. Adequate lighting should provide a comfortable reading level and allow the identification of
wire insulator colours without undue eye fatigue. Lighting should be comparable to an office work
environment, with a minimum level of 21 meter/68.9 feet at each work surface. As a rule of thumb, in a
room with a 2.5 meters/8.2 feet ceiling, one 1.2 meters/4 feet fluorescent tube provides sufficient
illumination for 1.9-2.4 square meters/20.5-25.9 square feet.
• Ensure that ventilation of the installation area is capable of maintaining an ambient temperature of 0-
40°C/32-104°F, and a relative humidity of 20-80% non-condensing, while the system is operating. The
maximum power rating of a base station under full load should not exceed 315W/1070 BTU/Hr. These
figures are for each cabinet only, and do not take into account heat generated by other equipment. In
particular, charging fully-discharged batteries may generate a considerable amount of heat, depending
on battery capacity and rate of charge. Refer to the equipment manufacturer data for more
information.