DCB LL-9.6FP Fast Poll
Multi-Drop Modem

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

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.

Rear view of DCB LL 9.6 FP Modem

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.

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

The DCB LL 9.6 FP modem 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 DCB LL 9.6 FP modem 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 DCB LL 9.6 FP modem 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 of the DCB LL 9.6 FP modem 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.

DCB LL 9.6 FP modem Specifications

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

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

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: Standard Power Supply:120 VAC, 30 Watts
Optional Power Supplies available
10 1/4" x 9 3/4" x 2 1/4"
Temperature: -40 to +75 C, Less than 95% non-condensing humidity

LL 9.6FP	Sync or Async 9.6Kbps Fast Poll, w/ Network Mgmnt Port
RK-8/16	Rack Mount Shelf
Various	See Power Supply Datasheet

DCB Products

DCB LL-9.6FP Fast Poll Multi-Drop Modem