Matrix Telecom SARVAM UMG System Manual page 58

Extended Passive Bus Configuration
ISDN
Network
Terminal
Resistance 100
Where,
TE = Terminal equipment of any ISDN Equipment
NT = Network Termination provided by Service Provider
TR = Terminal Resistance 100
d = Distance from NT to the last TE Equipment
d1 = The total distance from first TE equipment to the last TE equipment.
In an Extended Passive Bus Configuration,
• You can connect only 3 Terminal Equipment or ISDN devices. These devices are grouped together at one
end of the bus, which may extend to a distance of upto 1 kilometer from the NT.
• However, all the 3 Terminal Equipment/ISDN devices must be located within a range of 30 meters, as
shown in the figure.
• Using this configuration, any subscriber from ETERNITY GENX can access the BRI line and make
outgoing calls. At the same time, another subscriber from the ETERNITY GENX or any ISDN phone
shown in the figure can make outgoing calls from the same BRI line. In the same way, incoming calls are
possible on the same BRI line.
• Only two simultaneous speech paths can be established, as BRI supports 2 voice channels only.
• This configuration is useful on large premises where a limited number of ISDN devices (maximum 3) are to
be used within a range of 30 meters.
Installing the BRI Card
Take all the necessary precautions prescribed for handling the cards and electronic equipment: turn off
1.
power supply, always wear an electrostatic-discharge preventive wrist strap/belt and use a grounding mat.
Unpack the BRI card and check the package contents.
2.
Select any free (empty) slot from the universal slots. Unscrew and remove the filler bracket of the empty
3.
slot. Do not discard the filler bracket! Preserve it for future use!
Matrix SARVAM UMG System Manual
NT
BRI Port
(TE Mode)
ETERNITY GENX
Terminal 1
d < 1 Km
d < 30 m
ISDN Phone
Terminal 2
BRI Bus Bar
Terminal
Resistance 100
ISDN Phone
Terminal 3
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