4 2 FSU User Manual 61200.130L1-1Chapter 6. DTE Port ConfigurationFrame Relay ProtocolThe frame relay protocol is a synchronous protocol used toconcentrate two different devices into a common frame relay linkto the network. While configured for frame relay protocol, theFSU accepts frame relay frames from a router or a FRAD androutes to/from the network port based on the DLCI address.The address can be modified or preserved from the DTE andnetwork side based on the frame relay address table. FECN,BECN, DE, and C/R states are not changed as frames are trans-ferred between the DTE and the network ports. The menu treein Figure 6-4 shows the choices available when the frame relayprotocol is selected.Physical Layer OptionsInterface Type (CONN)Select the connector type for the DTE interface. The choices areV.35 and RS-232. See the appendix Pinouts for the connector pinassignments.Synchronous Bit Rate (RATE)Select the operating speed of the DTE interface. The selectionsare 2400, 4800, and 9600 bps and 19.2, 38.4, 56, 64, 112, 128, 168,192, 224, 256, 280, 320, 384, 448, and 512 kbps.Speed selections made for the Network Port affect the choices availablefor the DTE ports.Synchronous Idle Method (IDLE)Enable the FSU to transmit flags or all ones. When operating theframe relay protocol, configure this option to transmit flags.Hardware Flow Control (HDW FLOW CTRL)When enabled, the FSU varies the transmit clock rate to tempo-rarily limit the transmit data rate to the FSU.
