Installation Manual
Quidway R2600/3600 Series Modular Routers
Chapter 8
Function Modules
8-43
8.9 4BS Module
Caution:
If the ISDN BRI S/T interface cable of 4BS module is led out to the outdoor, a special lightning arrester
should be installed at the input end of the signal line to obtain better lightning protection effect.
8.9.1 Introduction
I. Function of 4BS
4BS is an abbreviation for the 4-port ISDN BRI interface module, mainly responsible for
receiving, transmitting and processing the data streams on the 4-channel ISDN BRI
S/T interface in R2600/3600 series.
4BS can work in dialup mode and leased line service mode.
II. Arrangement of 4BS ISDN BRI interfaces
The interfaces of 4BS ISDN BRI are arranged according to the following rules:
z The first interface is Bri0.
z Starting from slot 0, the interfaces for the first 4BS are numbered from Bri0 to Bri3,
and those for the second 4BS are numbered from Bri4 to Bri7, and so on.
z
In the same 4BS, the order for the interfaces is the same as that for the numbers
on 4BS.
For example: plug a 4BS to slots 1 and 7 in the Quidway R3680. Then the four Bri
interfaces in slot 1 are numbered from Bri0 to Bri3, and those in slot 7 are numbered
from Bri4 to Bri7
8.9.2 Appearance
The appearance of 4BS is shown in the following figure:
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