Installation Manual
Quidway R2600/3600 Series Modular Routers
Chapter 8
Function Modules
8-24
8.7 8AS/16AS Module
Warning:
Plugging or unplugging the interface cable of the 8AS/16AS module is prohibited when the router is
powered on, otherwise the equipment or the module may be damaged.
8.7.1 Introduction
I. Functions of 8AS and 16AS
AS stands for asynchronous serial interface.
Quidway R2600/3600 series support two kinds of AS module: 8AS, 16AS.
8AS is mainly responsible for receiving, transmitting and processing data streams on
the 8-port async interface.
16AS is mainly responsible for receiving, transmitting and processing data streams on
the 16-port async interface.
8AS and 16AS both features the following:
z
The maximum speed per line is up to 115.2Kbps, supporting terminal access
service and asynchronous leased line service. In addition, the asynchronous serial
interface can serve as a dialup access server for the small- and medium-sized
ISPs. Or, it can interconnect with 8 (8AS) LANs or 16 (16AS) LANs through the
asynchronous dialup line.
z
The interface cable for the 8AS module is a 1-to-8 connection cable: its DB-68 end
is connected with the 8AS module and the DB-9/DB-25 end is connected with the
network. The interface cable for the 8AS module is a “1 to 16” connection cable: its
DB-200 end is connected with the 16AS module and the DB-9/DB-25 end is
connected with the network.
II. Arrangement of interfaces of 8AS and 16AS
The interfaces of 8AS and 16AS are arranged according to the following rules:
z
The first interface is Async0.
z
Starting from slot 0, the interface of the first AS ranges from Async0 to Async7
(8AS) or from Async0 to Async15 (16AS). The interface of the second AS ranges
from Async8 to Async15 (8AS) or from Async16 to Async31 (16AS), and so on.
z
In the same 8AS/16AS, the order for the interfaces is the same with the numbering
order on 8AS and 16AS.
