6TAENG201-1E
TOTAL ACCESS 3000/3010
ENG-201
Page 18 of 32
© 2002, ADTRAN, Inc.
Total Access
®
3000/3010 System Manual
1.4.3
TL1 Over X.25
When the SCU is installed, the DB-25 connector (NTWK MGMT) is automatically
activated after power-up. TL1 commands can be sent and received only if a SCU is
installed in the Total Access 3000/3010. There are three ways that TL1 interfaces with
the SCU:
1. The DB-25 port (NTWK MGMT) on the backplane connected to an X.25 switch
either locally or remotely
2. A configuable TCP/IP port on the 10 Base T interface
3. The DB-25 port (ADMIN) on the backplane connected to a modem or a VT100
craft interface (A craft interface on the Admin port requires a null modem
adaptor)
The craft interface to the DB-9 will bring up the SCU menu that will have an option to
allow the user to enter TL1 commands. The craft interface (or modem, if remote
management is utilized) connected to the DB-25 connector (J31/J18 labeled ADMIN)
will also give access to the same SCU menu.
The DB-25 connection (NTWK MGMT) can interface with an X.25 switch. The
connection to the X.25 switch supports four simultaneous Switched Virtual Circuits
(SVCs). This allows for four parallel TL1 transactions simultaneously. The physical
connection between the switch and the shelf is a synchronous RS-232 interface that
transmits and receives data up to 64 Kbps.
If an X.25 connection is not available in the local Central Office, remote connections
can be made via a channel bank using a DSU-DP circuit. A T1 transports the signal to
a central office where an X.25 switch is physically located. The signal is de-muxed via
another channel bank and then sent to the X.25 switch via a second DSU-DP circuit.
Total Access 3000/3010 is supported by Telcordia’s NMA system. NMA can be
configured to connect to a Total Access 3000/3010 SCU over X.25 network in order to
receive TL1 autonomous messages. The SCU allows Total Access 3000/3010 to
operate as an Intelligent Network Element (INE) on the X.25 network. See
Menus can be accessed via the X.25 port by using the command entry:
menu;
