AT&T 1987 AT&T Telephone User Manual


 
Communications Access Manager (CAM)
CAM is an MS-DOS applications program that provides an enhanced calling interface
and terminal emulation for PCs connected to System 25 or a STARLAN NETWORK.
This connection must be through a DLC or a STARLAN NETWORK that is, in turn,
connected to System 25 by a STARLAN CP. Refer to the Communications Access
Manager (CAM) Program feature description for a more detailed description of the
program.
STARLAN INTERFACE Circuit Pack
The STARLAN INTERFACE CP (ZTN84) requires a single modular connection to the
STARLAN NETWORK (see Figure 2-42). It provides an interface between System 25’s Time
Division Multiplex (TDM) bus and STARLAN NETWORK’s packet switched network. The
STARLAN CP provides four full-duplex data connections at speeds up to 9,600 bits per
second.
The STARLAN CP operates in two modes: Gateway Mode and Bridge Mode. Gateway mode
supports connections from System 25 data terminals to STARLAN NETWORK UNIX®
system hosts, or from STARLAN NETWORK UNIX system hosts or client workstations to
System 25 hosts or modem pools.
In Bridge Mode, the STARLAN CP passes the STARLAN
NETWORK’s Universal Receiver Protocol (URP) through System 25 to a local or remote PC.
This is referred to as Bridge Mode and provides a through connection between PCs running
ACCESS and a STARLAN NETWORK. The proper mode (Bridge or Gateway) is auto-
selected by the system.
HOST
COMPUTER
PERSONAL
COMPUTER
DATA
TERMINAL
● ●
DATA
TERMINAL
OR
PC WITH
MODEM
DATA
TERMINAL
OR
PC WITH
MODEM
DATA
LINE
CP
POOLED
MODEM
CP
ANALOG
LINE
CP
TRUNK
CP
STARLAN
CP
SYSTEM 25
NETWORK
EXTENSION
UNIT
STARLAN NETWORK
(WORKSTATIONS/SERVERS/HOSTS)
Figure 2-42. STARLAN NETWORK and System 25 Configuration
2-216