Matrix Telecom SARVAM UMG System Manual page 57

Short Passive Bus Configuration
ISDN
NT
Network
Terminal
Resistance 100
Where,
TE = Terminal Equipment or ISDN device (End user device)
NT = Network Termination provided by the ISDN Service Provider
d = Distance from NT to the last TE equipment.
In a Short Passive Bus Configuration,
• A maximum of 8 TEs or ISDN devices can be connected to a single NT on a bus upto 200 meters from the
NT.
• 100 Terminal Resistance is required to be inserted at the NT side as well as the last TE Equipment as
shown in the figure.
• Using this configuration, any subscriber from ETERNITY GENX can access a BRI line and can make
outgoing calls. At the same time, another subscriber from ETERNITY GENX or any ISDN phone shown in
the figure can make outgoing call from the same BRI line. In the same way, incoming calls are possible on
the same BRI.
• Only two simultaneous speech paths can be established, as BRI supports 2 voice channels only.
• This configuration is useful on the smaller premises, where a single BRI line and multiple ISDN devices are
used.
51
BRI Port
(TE Mode)
ETERNITY GENX
ISDN Phone
Terminal 1 Terminal 2
d < 200 meters
ISDN Phone
Terminal 3
Matrix SARVAM UMG System Manual
BRI Bus Bar
Terminal
Resistance 100
ISDN Phone
Terminal 8