Cabletron Systems CSX1200 User Manual page 91

The T1-E1-PRI can be used for any T1, E1, or PRI resource, and directly terminates a standard
USOC RJ45 connector. It is supplied with a standard S/T interface and supports one port. It also
provides support for the following switch types:
• NTT
• 4ESS
• 5ESS
• Definity
• DMS100, DMS250
• SL100
• NET5
• 1TR6
• TS0-14
The ethernet-1 resource provides direct support for one standard AUI LAN connection. These AUI
interfaces provide connections for 10Base2, 10Base5 or 10BaseT transceivers.
The COMMPORT resource provides access to the CyberSWITCH's serial port (COM 1) for serial
(asynchronous) communications. This includes access for local console management, as well as
local async-PPP data transfer.
The following figure illustrates how the CyberSWITCH handles this asynchronous data when it is
in autosense mode (the system default). The data arrives through the COM 1 port, and is sent to an
internal Asynchronous Usage Discriminator (AUD), which monitors the data stream. The AUD
determines if this is to be a PPP connection, or a remote console connection. This determination is
made within a configurable time frame:
• if the AUD detects PPP LCP frames, it connects the data to a PPP stack. The CyberSWITCH sends
the data to the LAN as appropriate.
• if the AUD detects four carriage returns from a console device, it will provide analog console ac-
cess by presenting a CyberSWITCH login prompt to the console.
• if neither situation is detected within the configured time frame, the connection is turned over
to PPP.
Null Modem
Connection
Asynchronous
Usage
Discriminator
Console
Port
C R
ONFIGURING ESOURCES AND
PPP
PPP LCP
Stack
Frames
Console
4 CRs
Manager
(Carriage Returns)
(Login Prompt)
Workgroup Remote Access Switch
L
INES
Resources
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