ADTRAN TRACER 2xT1, Руководство пользователя

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VT-100 USER INTERFACE
The TRACER may be accessed with a VT-100 compatible terminal set to 9600 bits per second, 8 data
bits, and no parity, connected to the RS-232 port on the back of the unit. Once a terminal is connected,
pressing the ESC key will present the System Status screen. If password access has been enabled, then
press “Enter” or “Return” in order to see the “Enter Password:” message. TRACER is shipped with
password protection disabled.
RS-232 INTERFACE
The TRACER has an RS-232 interface for system management via an attached VT-100 terminal,
personal computer, or modem. The RS-232 port is configured as a DCE with the following pin
assignments:
Signal Pin
Name Number Direction
TXD 2 To TRACER
RXD 3 From TRACER
RTS 4 To TRACER
CTS 5 From TRACER
DSR 6 From TRACER
Ground 7
DCD 8 To TRACER
DTR 20 To TRACER
MODEM CONNECTION
Option 16, discussed in the Configuration Menu page of this section, will enable or disable modem
control. When this option is enabled from a standard terminal connection, all RS-232 communications
will cease until a modem is attached with a Null-Modem adapter between the TRACER and data modem.
The data modem will need to be configured for AUTO ANSWER and 9600 BPS. When the user
connects via modem to the TRACER unit, communications via the RS-232 port will resume. If a user
accidentally enables modem control from a terminal and disrupts the RS-232 communication, pressing
[CTRL Z] three times, will temporarily disable the modem control option. This will allow the user to
access the configuration menu to disable modem control.
When modem control is enabled, the RS-232 port is inactive until DTR and DCD are active. This
prohibits data being sent to the modem or received from the modem while idle. The required Null-
Modem adapter may be obtained at any computer hardware supplier. A straight-through serial cable
should be used between the adapter and the modem or TRACER unit. To ensure that the far-end modem
disconnects when desired, option 17 of the CONFIGURATION MENU will disconnect the modem. The
modem must be configured to drop the connection on loss of DTR in order to disconnect.
TELEMETRY BYTE ORIENTED SERIAL (TBOS) INTERFACE
E-telemetry systems were developed by the pre-divestiture AT&T organization as a method to monitor
and control diverse network elements from a remote, centralized location. Status and command remote
(SAC) units were employed in the central office to convert discrete (contact closure) alarms from
monitored equipment into E-telemetry for efficient transfer of data to and from the operations center.
S
ECTION
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O
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TRACER 2xT1 User’s Manual 23 Preliminary