The 3028 Turbo provides high performance, easy installation and operation, and full compatibility with the DCX® multiplexer series. With the 3028 Turbo you can diagnose problems, check traffic statistics, review channel status and monitor events on the multiplexer and communications line from the front panel or a supervisory terminal. These capabilities are provided for both the local and remote devices. "Link Down" and "Data Loss" Status signals and a programmable Krypto Reset Pulse are provided on the supervisory interface.

With the 3028 Turbo, a user can consolidate synchronous (SDLC/HDLC) or asynchronous data from as many as eight terminals or CPU ports on a single synchronous modem or DSU link, thus reducing facilities costs. Error detection is provided through the use of a 16 bit Cyclical Redundancy Check (CRC). In the event of an error, the 3028 Turbo automatically retransmits the data to insure error free reception. Several flow control methods are user-selectable, providing optimal data transfer.

Configuration and Management
Configuration can be performed using a local/remote asynchronous port, the local/remote dedicated supervisor port or the local/remote front panel. All available options on each channel can be set independently of other channels. The supervisor port is completely menu driven, eliminating the need to memorize commands, options and syntax. All available options are presented in plain English on an asynchronous ASCII terminal. Access to the supervisor function can be password protected. The supervisor port allows configuration, monitoring, problem diagnosis and statistics inquiry during multiplexer operation. The supervisor can sign on to either the local or remote end of the link without interfering with operation or data flow. Alternatively, access to the full array of supervisory functions may also be gained from any terminal attached to a standard channel. For immediate notification of potential problems, the monitor mode reports events occurring on both channel and link interfaces for both local and remote sites. An extensive complement of channel and link statistics aid in diagnosing and resolving problems, as well as to plan for future network requirements.

Number of Channels: Eight
Channel Speeds: Up to 19.2 Kbps
Link Speeds: Up to 64 Kbps
Maximum Aggregate Speed: 76.8 Kbps
Interface Standards: EIA RS-232-C, CCITT V.24
Autobaud Rate Detection: 150 to 9600 bps
Protocols Supported: SDLC/HDLC or Asynchronous
Code Level: 5, 6, 7 and 8 Data Bits; 1, 1.5 and 2 Stop Bits; 1 Bit Parity
Conditions Reported in Monitor Mode: Local & Remote Channel Reset; Flow Control Invoked; Reverse Flow Control Invoked; Channel in Loopback; Channel is Active; Link Failed; Link Established; Supervisor Signed On; Supervisor Signed Off
Channel Statistics (per Channel): Current & Peak Buffer Utilization; Parity & Framing Errors; Flow Control Invoked; Reverse Flow Control Invoked
Link Protocol: Modified HDLC, X.25 Level 2
External Status Leads: "Link Down"; "Data Lost"; Krypto Reset
EIA Signal Propagation: RTS=DCD, DTR=DSR, BO=RI, DRSS=CTS
Link Statistics: Current & Peak Transmit Utilization; Current & Peak Receive Utilization; Current & Peak Frames Received; Current & Peak Frames in Error; Current & Peak Frames Retransmitted
Flow Control Options: None; DC1/DC3 (XON/XOFF); DC1/DC2; DC2/DC4; User Specified Character; HP ENQ-ACK; Wang 2200; Tandem T-Pause; CTS, DSR
Reverse Flow Control Options: None; DC1/DC3 (XON/XOFF); DC1/DC2; DC2/DC4; User Specified Character; HP ENQ-ACK; Wang 2200; Tandem T-Pause; RTS, DTR
Error Control: 16 Bit Cyclical Redundancy Check (CRC)
Buffer Capacity: 16,384 Bytes
Additional Features: Channel Loopback; Channel Validation; Channel Reset; Link Loopbacks; Flyback Buffering; Echoplex; Odd/Even/No Parity; Break Propagation; Data Activity; EIA Signal Status; Force EIA States
Link Timing: Internal: 1.2 to 19.2 Kbps; External: to 64K
Power: 115/230VAC, 60/50Hz, 0.16/0.08A, Switchable, UL approved
Dimensions: Height: 1.75 inches (4.44cm); Width: 17.00 inches (43.18cm); Depth: 11.00 inches (18.93cm)
Weight: 4.5 lbs (2.1 Kg)
Environment: Op Temp: 32° to 122°F (0° to 50°C); Rel Humidity: 5 to 90% non-condensing