Typical Applications Of Terminal Access - 3Com MSR 50 Series Configuration Manual

740 C 51: T
HAPTER ERMINAL
Typical Applications of
Terminal Access
A C
CCESS ONFIGURATION
router transports data transparently between the connected service terminal and
FEP to implement service interaction and processing.
The TTY terminal access solution implements the fixed terminal number function
and offers many enhanced functions such as dynamic multi-service switching,
real-time screen saving, terminal reset, and data encryption. Meanwhile, the FEP
provides professional terminal management software, enriching the system
functions while simplifying the management. In addition, the combination of TTY
terminal access and routers makes remote offices possible and implementation of
IP telephony more easy, offering a solution for establishing high-efficient networks
with diverse functions.
Introduction to Telnet Terminal Access
The initiator and receiver of Telnet terminal access are a router and an FEP. A
service terminal is connected to the router (Telnet client) through an asynchronous
serial interface. The router is connected to the FEP (Telnet server) through a
network. Application services run on the FEP. The FEP interacts with the router
through Telnet, thereby implementing data exchange between the terminal and
the FEP.
Telnet terminal access implements the following basic functions: up to eight VTYs
supported on a terminal, TTY terminal access or Telnet terminal access used by the
VTYs on a terminal, menu screen switching, VTY service fast switching, and
terminal screen saving.
Introduction to RTC Terminal Access
The initiator and receiver of RTC terminal access are routers. RTC terminal access is
another typical application of terminal access. It interconnects a local terminal and
a remote terminal through routers for data exchange and data monitoring. At
present, RTC terminal access supports the asynchronous mode only.
In asynchronous RTC terminal access, the monitoring terminal at the data center
and the monitored terminal are each connected to a different router through an
asynchronous serial interface, and the routers exchange data with each other
through an IP network. Normally, the router connected to the monitoring device
acts as the terminal access initiator (the RTC client). The monitoring device is
always ready to initiate a connection request at any time to access the data on the
monitored device. The router connected to the monitored terminal acts as the
terminal access receiver (the RTC server) and is always ready to receive the
connection requests from the monitoring device and send monitored data in
response.
RTC terminal access mainly serves the following three purposes:
Enabling the monitoring device to manage and monitor remote terminals,
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Collecting data from the remote terminals.
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Fulfilling the functions of a multiplexing device and transmitting data over IP
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networks for easy network upgrade.
Terminal access is widely used in the systems in which large numbers of FEPs are
deployed, such as banking, postal service, taxation, customs, and civil aviation.
This manual uses a banking system as an example to describe terminal access