Voip connection – 2N StarGate/BlueTower v5.3 User Manual

Page 50

GSM / UMTS signal intensity (minimum recommended signal level

). You

: –80dB

can use the NET monitor on a mobile phone (e.g. Nokia, Siemens) or the
diagnostics screen in the web interface for measuring the GSM / UMTS signal
intensity.
Unoverloadable GSM / UMTS cells to which the gateway modules are logged in;
please keep in mind that up to 30 calls are set up at a time during full traffic
(according to the gateway configuration).
No strong electromagnetic radiation is allowed on the system installation site.
No strong electromagnetic reflections are allowed on the antenna installation site.
The ISDN PRI connection must be configured properly and meet the ITU–T
Q.931–EDSS1 and related recommendations.
The VoIP – SIP signalling must meet the required RFCs.
Place the gateway into an environment that complies with the gateway working
conditions (an air conditioned room or installation rack).
An appropriate (according to the power supply unit used) power feeding with
overvoltage protection and an on–line UPS are recommended.
An Ethernet connection on the installation site is advisable for comfortable
gateway administration.
All the SIM cards to be used must have the same PIN code (or deactivated PIN
code) and be activated by the GSM / UMTS provider.

Warning

The outdoor antenna cable has to be connected according to the
overvoltage protection and grounding safety rules.
High temperatures on the installation site may cause short–time
or permanent gateway errors!

Warning

Do not cover the top, bottom and rear sides of the gateway to
avoid overheating and gateway error!
Protection against humidity and extreme temperatures: The
appliance may never be placed close to heat sources (radiators)
or places exposed to direct sunshine. Also places with high
humidity (such as bathrooms and cellars), places with significant
temperature fluctuation (next to doors, windows), dusty places
(workshops) and places exposed to aggressive gases
(accumulator rooms, boiler rooms) as well as places with
intensive vibrations and places exposed to shocks (compressor
rooms, heavy industrial operations) should be avoided. The
system should be installed horizontally.

VoIP Connection

All the gateway types have the same features. The only difference lies in the number of
simultaneous calls through the VoIP card.