6
Section 61180008L1-5, Issue 2
61180008L1-5B
the user to view all provisioning settings, alarms, and
statistics. An account with Test privileges will also
allow the account to perform tests.
Figure 2
illustrates the menu structure of the SCU.
Submenus are elements that move the user down to
the next menu level. Menu items are elements which
allow the user to make changes to the current SCU
settings. There are two different types of menu items:
read-only and read-write.
A read-only menu item displays information that can
not be changed, such as the status of the SCU. A
read-write menu item displays information that when
selected can be changed, such as the baud rate of the
admin port.
Intersystem Communication (RS-485)
The ADTRAN Total Access 1500 SCU supports
communication with other Total Access 1500 systems
over a shared, twisted-pair, half-duplex, RS-485 link.
The SCU from each system is connected in parallel on
this bus. Pin A should be connected to pin A, and Pin
B should be connected to Pin B, so each shelf is in
parallel. One SCU acts as the master controller and
all others function as slaves. Physical access is
attained by way of wire-wrap posts (P12) on the rear
of the Total Access 1500 Shelf. Up to 32 shelves may
be clustered together via the RS-485 bus.
To set up RS-485 chaining, perform the following:
1. Give the first SCU in the chain a unique Target
ID (TID).
2. Enable RS-485 Interface.
3. Set Interbank Communication Mode to Host.
4. Give the next SCU in the chain a unique Target
ID (TID).
5. Enable RS-485 Interface.
6. Set Interbank Communication Mode to Client.
Repeat steps 4-6 until up to 32 shelves have been
chained.
Setting the Target ID (TID)
A unique Target ID (TID) must be given to each shelf
of a chained RS-485 cluster. To set the Target ID
(TID) in the Total Access 1500 SCU, perform the
following:
1. Logon to the system.
2. From the Total Access 1500 main menu, select
option 1, System Controller, and press ENTER.
3. From the System Controller menu, select option
2, Provisioning, and press ENTER.
4. From the Provisioning menu, select option 6,
Target ID (TID), and press ENTER.
5. Enter the appropriate Target ID and press
ENTER.
NOTE
The Target ID (TID) may consist of up to 20
characters. The first character must be a letter.
The remaining characters minus the last character
may be alphanumeric or a hyphen. The last
character must be alphanumeric.
An example of a Target ID (TID) follows:
HTVLALEXD01
Where:
HTVL
designates the city
AL
designates the state
EX
identifies the Central office or remote
terminal
D
identifies the equipment type ("D" is
administrative equipment)
01
identifies the piece of equipment of
that type at the CO
