DCB LL-9.6FP
Fast Poll synchronous and asynchronous modem

The modem is a full featured 9,600 bps CCITT V.29 fast poll multi-point, multi-drop leased line modem. The LL 9.6 FP modem operates over four wire unconditioned leased lines at 9600 bps synchronous or asynchronous. It is an excellent choice for multipoint multidrop and point-to-point applications with polled terminal devices.

9600 bps V.29 / Fast Poll synchronous and asynchronous modem

FEATURES
DESCRIPTION
SPECIFICATIONS

General
Indicators (front panel)
Controls
Telco
Data Port
Network Management
Front Panel and Network Management Port Commands
Additional Commands in Network Management Port
Physical/Electrical

APPLICATION

HOW TO ORDER

FEATURES

• Multidrop or Point-to-Point
• 4-wire unconditional leased line operation
• Synchronous or asynchronous
• LCD display
• Network Management port
• Rack mounts in DCB MR-8
• Addressable remote diagnostics

DESCRIPTION

The DCB LL 9.6 FP modem is a full featured fast poll leased line modem with the best price/benefit ratio in the industry. The LL 9.6 FP modem operates over four wire unconditioned leased lines at 9600 bps synchronous or asynchronous. It is an excellent choice for multi-point and point-to-point applications with polled terminal devices.

An LCD front panel or the Network Management Port is used to configure the local modem or perform line diagnostics including the V.54 loopbacks. In addition, the Network Management Port can be used to configure the remote mode.

The LCD front panel is used to set-up the following parameters for the local modem:

Modem Rate
Modem Address
RTS/CTS Delay
RTS Holdover
RTS Stream
RTS Control
Transmit Carrier
Transmit Clock Source
Synchronous or Asynchronous
Receive Level
Transmit Level
Transmit Data Clamp

In addition, the LCD front panel can initiate the following diagnostic tests:

Line Test
Digital Loopback
Analog Loopback
Remote Digital Loopback
Send 1004 Hz tone
Remote send 1004 Hz tone

The LCD front panel continuously updates and displays the receive level. This is the most useful information when diagnosing line troubles with the telephone company.

The Network Management Port is accessed through a 9-pin RS-232-D asynchronous port on the rear panel. It can access all of the set-up and diagnostic tests available through the LCD front panel and be used to configure the remote modem and measure the remote receive level.

SPECIFICATIONS

General

Rate: 9600 bps
Fallback rates: 7200 and 4800 bps
Application: Multi-point or point-to-point
Facility: Four wire leased lines
Mode: Full Duplex
Signaling: Fast train mode for multidrop, CCITT V.29, Automatic Adaptive Equalization, 2400 baud, QAM modulation, 1700 Hz carrier frequency
Timing: Synchronous or Asynchronous 22 ms RTS/CTS delay

Indicators (front panel)

Power, Transmit Data, Receive Data, Carrier Detect, and Clear to Send
16 character by 2 line LCD display for configuration and testing

Controls

Front panel push buttons for Next, ->, INCR, OK, RESET

Telco

Interface: Four wire lease line
Connector: RJ11-C

Data Port

Interface: RS-232-D, V.24
Connector: DB25 female
Timing: Synchronous or Asynchronous

Network Management

Interface: RS-232-D, V.24
Connector: DE-9 female
Timing: Asynchronous

Front Panel and Network Management Port Commands

Rate: 9600, 7200 or 4800 bps
Sync/Async
Transmit timing: Internal, External or Slave
Receive level: -26 or -43 dBm
Transmit level: 0 to -15 dBm
RTS control: Forced on or from interface
Transmit Data Clamp: On or off
Test line
Digital loopback
Local analog loopback
Remote digital loopback
Send 1004 Hz tone
Remote send 1004 Hz tone

Additional Commands in Network Management Port

Local and remote Show Config
Remote modem Type
Local and remote Set ID
Remote Measure Level

Physical/Electrical

Power requirements: 120 VAC, 43 Watts, .36 Amps
10 1/4" x 9 3/4" x 2 1/4"

Rear view of DCB LL 9.6 FP Modem

APPLICATION

DCB Products