9-8 Frame Relay Module 4.0 User Guide, Rev 01Physical Port Interfaceis determined by the Line Interface Card(s) and attached cables. The RLP record iden-tifies the LIC, and only the valid interfaces will be displayed on the Port screen,among: RS-232, V.35, RS-449, and X.21. ( RS-449 and X.21 interfaces are valid if theLIC is RS-422.)Blocked Port Flagwill cause the port to be enabled (N) or disabled (Y) at node IPL. The port will remainin that state until this parameter is changed or an on-line enable ([B], [B], [C] from theMain Menu) or disable ([B], [B], [A] from the Main Menu) is performed.Line Speedis the data transmission rate in bits per second, and the clock speed on a serial portwhen the port is a physical DCE (i.e., the attached I/O cable is DCE). If this port is aphysical DTE, specify the line speed that matches (as closely as possible) that of thedevice connected directly to the port.Selecting this parameter will display a list of ranges. Press the letter corresponding toa range to display the valid speeds within that range. All possible speeds are:75 150 300 600 12002400 4800 9600 14.4K 19.2K24K 28.8K 38.4K 48K 56K64K 72K 112K 128K 168K192K 224K 256K 280K 320K336K 384K 392K 448K 504K512K 560K 576K 616K 640K672K 704K 728K 768K 784K832K 840K 896K 952K 960K1.008M 1.024M 1.064M 1.088M 1.12M1.152M 1.176M 1.216M 1.232M 1.28M1.288M 1.344M 1.4M 1.408M 1.456M1.472M 1.512M 1.536M 1.568M 1.6M1.624M 1.664M 1.668M 1.728M 1.792M1.856M 1.92M 1.984M 2.048MIf an RS-232 DCE port is directly connected to the DTE via the standardCabletron cable, the maximum supported speed is 64K. If longer cabling isused, the maximum speed is 19.2K. (The EIA standard for RS-232addresses speeds up to 19.2 Kbps.)No Data Poll Periodis the time between polls by this TPAD port of its PU (physical unit) when the PU hasno data to send. This parameter has no relevance on an HPAD port.No Resp Poll Periodis the time between polls by this TPAD port of its PU when the PU is not responding.The TPAD will continue to poll at this interval up to the number of times specified byMaximum Retransmissions. This parameter has no relevance on an HPAD port.Maximum Retransmissionsis the maximum number of times the port will attempt to send a frame if the PU is notresponding. A larger value increases the probability of an eventual correct transferbetween DTE and DCE, but a smaller value permits faster detection of a permanenterror condition.
