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50 FSU 5622 ESP User Manual 61200.175L1-1

Chapter 6. DTE Port Configuration

Frame Relay Protocol

The frame relay protocol is a synchronous protocol used to

concentrate two different devices into a common frame relay link

to the network. While configured for frame relay protocol, the

FSU 5622 ESP accepts frame relay frames from a router or a

FRAD and routes to/from the network port based on the DLCI

address. The address can be modified or preserved from the

DTE and network side based on the frame relay address table.

FECN, BECN, DE, and C/R states are not changed as frames are

transferred between the DTE and the network ports. The menu

tree in Figure 6-4 shows the choices available when the frame

relay protocol is selected.

Physical Layer Options

Interface Type (CONN)

Select the connector type for the DTE interface. The choices are

V.35 and EIA-232. See the appendix Pinouts for the connector pin

assignments.

Synchronous Bit Rate (RATE)

Select the operating speed of the DTE interface. The selections

are 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.

For rates higher than 56/64 kbps, the ESP external DCE card is

required.

Speed selections made for the Network Port affect the choices available

for the DTE ports.

Transmit Idle Code (IDLE)

Enable the FSU 5622 ESP to transmit flags or all ones. When

operating the frame relay protocol, configure this option to

transmit flags.

Hardware Flow Control (HDW FLOW CTRL)

When enabled, the FSU 5622 ESP varies the transmit clock rate to

temporarily limit the transmit data rate from the DTE device to

the FSU 5622 ESP.

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ADTRAN 1204006L1 Bedienungsanleitung Seite 66