Frame Relay

DLPI STREAMS Driver for Frame Relay

• Implements DLPI Ver 2.0
• STREAMS Multiplexor driver
• Compatible with UNIX 5.3 and 5.4, QNX and Linux
• Network management support
• Uses CDI to interface to physical line driver below
• Supports user API and TCP/IP interface

CDI STREAMS Driver for Physical Line Driver

• STREAMS device driver
• Compatible with UNIX 5.3 and 5.4, QNX and Linux
• Network management support
• Drivers for a variety of synchronous boards

Frame Relay Protocol Standards

• T1.606
• LMI, Annex D
• ISDN compatible
• T1.602 (LAPD) core services
• Q.921 LAPD available

Configurable Parameters

• Committed information rate
• Committed rate measurement interval
• Committed burst size
• Excess burst size
• Encapsulation type
• LMI type and options

Frame Relay Features

• Multiple physical links
• Multiple PVCs per link
• Data metering according to CIR
• Adjustable measurement interval
• Congestion signaling
• Invalid frame signalling
• Use of LMI and Annex D to manage the link
• LAPD core framing
• Statistics gathering
• Trace buffers for diagnostic procedures

Frame Relay Line Level Features

• Maximun frame size
• Watchdog timer on transmissions
• Inter-frame delay option
• Oscillation detection for modem signals
• Statistics: CRC errors, underruns, overruns, aborts, number of bytes transmitted/received, others

Physical Interfaces

• V.35/RS232
• 56Kbps DDs
• T1 or fractional T1