7Section 61245207L2-5, Issue 261245207L2-5C5. CONTROL PORT OPERATIONThe FT1 DP provides a faceplate-mounted DB-9connector that supplies an RS-232 interface forconnection to a controlling terminal. The pinout ofthe DB-9 is illustrated in Figure 5.The terminal interface operates at data rates from2.4 kbps to 19.2 kbps. The asynchronous data formatis fixed at 8 data bits, no parity, and 1 stop bit. Thesupported terminal type is VT-100 or compatible.NOTEIf you are using a personal computer (PC)with terminal emulation capability, be sure todisable any power saving programs.Otherwise, communication between the PCand the HDSL unit may be disrupted, resultingin misplaced characters or screen timeouts.OperationAbbreviations used in the screen diagrams are detailedin Table 5.A terminal session is initiated by entering multipleFigure 5. RS-232 (DB-9) Pin Assignments678912345TXD (Transmit Data)RXD (Receive Data)SGN (Signal Ground)Table 5. Definition of Screen AbbreviationsDefinitionErrored secondsDS1 (SF) ....... Second in which a BPV or frame bit error occursDS1 (ESF) .... Second in which a BPV or CRC error occursDSL .............. Second in which a CRC error occursSeverely errored secondsDS1 (SF) ....... Second in which 1554 BPVs or 8 frame bit errors occurDS1 (ESF) .... Second in which 1544 BPVs or 320 CRC errors occurDSL .............. Second in which 165 CRC errors occurUnavailable secondsDS1 ............... Second in which there is a loss of signal or syncDSL .............. Second in which there is a loss of signal or syncSuperframe formatExtended superframe formatBipolar with 8-zero substitutionAlternate mark inversionLine build-outBipolar violationDS1 ............... Second in which a bipolar violation occursT1 network interface unitSerial numberFifteen-minute periodTwenty-four-hour periodAbbreviationES ...........................SES .........................UAS ........................SF ............................ESF .........................B8ZS .......................AMI ........................LBO ........................BPV ........................NIU .........................S/N ..........................15M ........................24H .........................