Installation Manual
Quidway R2600/3600 Series Modular Routers
Chapter 8
Function Modules
8-47
2S1B can be used in R2600/3600 series. It is mainly responsible for receiving,
transmitting and processing the data streams on the 2-channel sync/async serial
interface and the 1-channel ISDN BRI S/T interface. The ISDN BRI S/T interface can
work in dialup mode and leased line mode.
2S1B has two DB-50 interfaces to connect with external sync/async interfaces, and it
also has a RJ-45 connector for connection with ISDN BRI S/T.
8.10.2 Appearance
The appearance of 2S1B is shown in the following figure:
Figure 8-46 Appearance of 2S1B
8.10.3 Interface Attributes
2S1B has two different interfaces: sync/async serial interface and ISDN BRI. Their
respective attributes are given in the following two tables:
Table 8-32 Attributes of sync/async serial interface of 2S1B
Description
Attribute
Sync Async
Connector DB-50X2 DB-50X2
V.24 V.35 X.21 EIA/TIA-449 EIA-530
Interface
standard and
operating mode
DTE
DCE
DTE DCE
DTE
DCE
DTE
DCE
DTE
DCE
EIA/TIA-232
Minimum baud
rate (bps)
1200 1200 1200 300
Maximum baud
rate (bps)
64K 2.048M 2.048M 115.2K
Services
supported
---Dialup via Modem
---DDN
---Terminal access service
---Dialup via Modem
---Backup
Protocols
supported
---PPP
---MP
---LAPB
---X.25
---HDLC
---SDLC
---Frame Relay
---PPP
---SLIP
---MP
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