Apple Service Source 1996 February

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Text File | 1992-09-18 | 24.0 KB | 738 lines | [TEXT/MPS ]

! ! NetModem™ CCL script using software MNP protocol ! ! Change History- ! v1.0 09/21/90 gs:General Release Version ! v1.0.2 12/07/90 gs:Create minor release version ! ! The following label ranges (0-255) are defined for all scripts: ! ! Label Function ! ----- -------- ! 0-19 Communications Setup ! 20-39 Get a Modem (IBX switch thru) ! 40-59 Modem Setup ! 60-79 Dialing ! 80-99 Physical Connection ! 100-119 GEIS Logon ! 120-139 CICS ! 140-159 APPM ! 160-179 Online ! 180-199 Terminate Session ! 200-209 Cancel ! 210-219 Hangup ! 230-239 <UNUSED> ! 240-255 Disconnect ! ! Note: Label 210 is the modem hangup sequence ! Label 240 is reserved as the start of the disconnect sequence ! !================================================================================ -LABEL 0 !***<Physical connection entry point>*** Initialize Communications !================================================================================ ! ! Select the MNPSerial Tool, initialize some parameters and open the session. ! ! CTBTOOL <Toolname> [<LabelIfToolDoesn'tExist>] [<LabelIfError>] [<ctb flags>] [<buffer sizes>] CTBTool "MNPSerial Tool" 4 5 ! CTBPARAMETER <ParameterName> <NewValue> [<LabelIfError>] CTBParameter MNPAutoEngage On 6 CTBParameter MNPAutoengageString "CONNECT ~Baud\13" 7 CTBParameter MNPConnectionMode Initiator 8 CTBParameter MNPAutoEngageDelay 30 9 CTBParameter MNPConnectAtOpen No 10 CTBParameter MNPCloseConnectionIfMNPFails Yes 11 CTBParameter Baud ~Baud 12 CTBParameter Port "~MPrt" 13 ! Dont set Data, Stop, or Parity bits for S/W MNP (defaults to 8,1,0 in the tool) ! ! CTBOPEN [<LabelIfOpenFails>] [<LabelIfError>] CTBOpen 14 15 ! Open the Communications session ! ! Flush any data, Initialize script variables and define Cancel label Flush ! clear input buffer and ring buffer CanBtn 200 ! If user cancels, take the error return ! SetVar 1 0 ! #of consecutive no responses to hangup command SetVar 2 0 ! #of consecutive no responses to modem configuration command SetVar 3 0 ! #of consecutive network contact failures. SetVar 4 0 ! #of logon validation failures SetVar 5 0 ! #of consecutive CICS90 failures SetVar 6 0 ! #of consecutive APPM failures SetVar 7 0 ! flag to indicate if connecting(0) or disconnecting(1) SetVar 8 0 ! not used ! Jump 20 ! Go to Modem Selection and Setup ! !********* -LABEL 4 !---<MNPSerial Tool missing>--- !********* Alert -1 The MNP Serial tool cannot be found in your System folder.\13Please install it, and try again. Exit -1 ! exit the script with an error ! !********* -LABEL 5 !---<CTBTool Comm Toolbox err>--- !********* Alert -1 A CTBTool error has occurred in the Communications Toolbox.\13Please try again.\13If the problem continues, call the Apple USA helpline. Exit -1 ! exit the script with an error. ! !********* -LABEL 6 !---<CTBParameter MNPAutoengage failed>--- !********* Alert -1 CTBParameter MNPAutoengage caused an error. Exit -1 ! exit the script with an error. ! !********* -LABEL 7 !---<CTBParameter MNPAutoengageString failed>--- !********* Alert -1 CTBParameter MNPAutoengageString caused an error. Exit -1 ! exit the script with an error. ! !********* -LABEL 8 !---<CTBParameter MNPConnectionMode failed>--- !********* Alert -1 CTBParameter MNPConnectionMode caused an error. Exit -1 ! exit the script with an error. ! !********* -LABEL 9 !---<CTBParameter MNPAutoEngageDelay failed>--- !********* Alert -1 CTBParameter MNPAutoEngageDelay caused an error. Exit -1 ! exit the script with an error. ! !********* -LABEL 10 !---<CTBParameter MNPConnectAtOpen failed>--- !********* Alert -1 CTBParameter MNPConnectAtOpen caused an error. Exit -1 ! exit the script with an error. ! !********* -LABEL 11 !---<CTBParameter MNPCloseConnectionIfMNPFails failed>--- !********* Alert -1 CTBParameter MNPCloseConnectionIfMNPFails caused an error. Exit -1 ! exit the script with an error. ! !********* -LABEL 12 !---<CTBParameter Baud failed>--- !********* Alert -1 CTBParameter Baud caused an error. Exit -1 ! exit the script with an error. ! !********* -LABEL 13 !---<CTBParameter Port failed>--- !********* Alert -1 CTBParameter Port caused an error. Exit -1 ! exit the script with an error. ! !********* -LABEL 14 !---<CTBOpen failed>--- !********* Alert -1 CTBOpen could not open communications.\13The serial port may already be in use. Exit -1 ! exit the script with an error. ! !********** -LABEL 15 !---<CTBOpen err>--- !********** Alert -1 CTBOpen caused an Communications Toolbox error. Exit -1 ! exit the script with an error. ! !================================================================================ -LABEL 20 !***<Modem Selection>*** Select modem through IBX switch !================================================================================ ! !================================================================================ -LABEL 40 !***<Modem Setup>*** Modem Reset and Setup !================================================================================ DsplyPic 1 DsplyMsg Making sure the modem is ready. ! No need to hangup when coming into the script SetVar 1 0 ! clear # hangup tries counter ! !********** -LABEL 42 ! ---<Got modem attention>--- !********** DsplyMsg Setting modem parameters. ! Clear all previous MatchStr's and setup the modem MatchStr 1 42 Dummy Wait 30 ! Give modem .5 second to get ready before sending the attention chars Xmit AT ! Send NetModem™ commands Wait 3 ! Pause before "turn off the command echo" command Xmit E0 Wait 3 ! Pause before "verbal result messages" command Xmit V1 Wait 3 ! Pause before "select all result codes" command Xmit X1 Wait 3 Flush ! clear input buffer and send Carriage Return (CR) Xmit \13 ! ! Look for one of the following expected responses MatchStr 1 60 OK Wait 180 ! wait 3 secs IncVar 2 ! increment # modem setup tries IfVar 2 3 44 ! if 3 tries, display Modem Configuration Alert DsplyMsg Modem does not respond to setup commands. Retrying ... Jump 42 ! else try modem setup again ! !********** -LABEL 44 ! ---<Modem configuration err>--- !********** Bell Alert 200 The modem is not responding to setup commands.\13Turn the modem off and then on again before retrying. SetVar 2 0 ! clear # modem setup tries Jump 40 ! reset modem and try again ! !================================================================================ -LABEL 60 !***<Modem ready>*** Dial phone !================================================================================ DsplyMsg Dialing ~Fone ... DsplyPic 2 ! Clear all previous MatchStr's (No comments on same line as MatchStr's) MatchStr 1 60 Dummy SetVar 2 0 ! clear #modem setup tries Wait 30 ! Give modem .5 secs to get ready before sending the attention chars Xmit AT Wait 3 ! Pause before "tone dial" command Xmit D~Tone Wait 3 ! Pause before phone number Xmit ~Fone Wait 3 Flush ! clear input buffer and send CR Xmit \13 ! ! Look for one of the following expected responses MatchStr 1 80 ~Baud\13 MatchStr 2 66 CARRIER MatchStr 3 70 BUSY MatchStr 4 74 NO DIAL MatchStr 5 62 ERROR MatchStr 6 80 1200\13 MatchStr 7 80 2400\13 MatchStr 8 80 4800\13 MatchStr 9 80 9600\13 Wait 2100 ! wait 35 secs ! !********** -LABEL 62 !---<No response or ERROR from modem>--- !********** IncVar 3 ! Increment # dial attempts counter IfVar 3 4 64 ! if 4 attempts, display No Dial Response Alert DsplyMsg Modem does not respond to Dial command. Retrying ... Jump 40 ! reset modem and try again ! !********** -LABEL 64 !---<No dial response err>--- !********** Bell Alert 200 The modem is not responding to dial command.\13Make sure your modem is connected to a phone line. SetVar 3 0 ! clear # dial attempts counter Jump 40 ! reset modem and try again ! !********** -LABEL 66 !---<No Carrier>--- !********** IncVar 3 ! Increment # dial attempts counter IfVar 3 4 68 ! if 4 attempts, display No Carrier Alert DsplyMsg No Carrier with phone number dialed. Retrying ... Jump 40 ! reset modem and try again ! !********** -LABEL 68 !---<No carrier err>--- !********** Bell Alert 200 Cannot detect carrier signal after dialing.\13Make sure the phone number provided is correct. SetVar 3 0 ! clear # dial attempts counter Jump 40 ! reset modem and try again ! !********** -LABEL 70 !---<busy>--- !********** IncVar 3 ! Increment # dial attempts counter IfVar 3 4 72 ! if 4 attempts, display Busy Alert DsplyMsg Phone number dialed is busy. Pause before retrying. Wait 300 ! wait 5 secs DsplyMsg Phone number dialed is busy. Retrying .... Jump 40 ! reset modem and try again ! !********** -LABEL 72 !---<Busy err>--- !********** Bell Alert 200 All network access lines are in use.\13Try again later. SetVar 3 0 ! clear # dial attempts counter Jump 40 ! reset modem and try again ! !********** -LABEL 74 !---<No Dialtone>--- !********** IncVar 3 ! Increment # dial attempts counter IfVar 3 4 76 ! if 4 attempts, display No Dialtone Alert DsplyMsg Modem reports no dial tone. Retrying ... Jump 40 ! reset modem and try again ! !********** -LABEL 76 !---<No dialtone Error>--- !********** Bell Alert 200 Modem reports no dial tone.\13Make sure your modem is connected to a phone line. SetVar 3 0 ! clear # dial attempts counter Jump 40 ! reset modem and try again ! !================================================================================ -LABEL 80 !***<Establish Physical Connection>*** Send H's to identify us to network !================================================================================ DsplyMsg Requesting network attention ! Look for one of the following expected responses MatchStr 1 84 NO CARRIER MatchStr 2 100 U# Wait 12 ! Wait 0.2 sec before sending the first H Xmit H Wait 21 ! Wait another 0.35 sec before sending the second H Xmit H Wait 600 ! Allow 10 seconds for the U# to show up IncVar 3 ! No U#, increment # dial attempts counter IfVar 3 4 82 ! if 4 attempts, display No U# Alert DsplyMsg Unable to get network attention. Retrying ... Jump 40 ! reset modem and try again ! !********** -LABEL 82 !---<No U#>--- !********** Bell Alert 200 Unable to get the network's attention.\13Make sure you have the correct phone number. SetVar 3 0 ! clear # dial attempts counter Jump 40 ! reset modem and try again ! !********** -LABEL 84 !---<Line dropped>--- !********** IncVar 3 ! Increment # dial attempts counter IfVar 3 4 86 ! if 4 attempts, display Line Dropped Alert DsplyMsg Carrier signal dropped before network recognition. Retrying ... Jump 40 ! reset modem and try again ! !********** -LABEL 86 !---<Line dropped Err>--- !********** Bell Alert 200 Carrier signal dropped before network recognition.\13Try again. SetVar 3 0 ! clear # dial attempts counter Jump 40 ! reset modem and try again ! !================================================================================ -LABEL 100 !***<GEIS logon>*** !================================================================================ ! DsplyMsg Physical Connection established. Logging on to network ... DsplyPic 3 SetVar 3 0 ! clear # dial attempts counter Wait 6 ! wait 0.1 sec Flush ! clear input buffer ! Note: leave 2 spaces between ~Dist and ~Numb Xmit ~User,~Dist ~Numb,~Ridn\13 ! ! Look for one of the following expected responses MatchStr 1 104 NO CARRIER MatchStr 2 106 DISCONNECTED MatchStr 3 120 ===> MatchStr 6 108 N FAULT, MatchStr 7 108 T FORMAT, MatchStr 8 110 L DENIED MatchStr 9 112 BUSY MatchStr 10 112 DOWN Wait 4200 ! wait up to 70 seconds for a response IncVar 4 ! Increment # logon attempts counter IfVar 4 3 102 ! if 3 tries, display No Login Response alert DsplyMsg No logon response from network. Retrying ... Jump 40 ! reset modem and try again ! !********* -LABEL 102 !---<No Logon response>--- !********* Bell Alert 200 No logon response from network.\13Try again. SetVar 4 0 ! clear # logon attempts counter Jump 40 ! reset modem and try again ! !********* -LABEL 104 !---<Carrier dropped>--- !********* IncVar 4 ! Increment # login attempts counter IfVar 4 3 105 ! if 3 attempts, display Carrier dropped alert DsplyMsg Carrier signal dropped during network logon. Retrying ... Jump 40 ! reset modem and try again ! !********* -LABEL 105 !---<Carrier dropped Err>--- !********* Bell Alert 200 Carrier signal dropped during network logon.\13Try again. SetVar 4 0 ! clear # logon attempts counter Jump 40 ! reset modem and try again ! !********* -LABEL 106 !---<Session disconnected>--- !********* IncVar 4 ! Increment # logon attempts counter IfVar 4 3 107 ! if 3 attempts, display Session disconnected alert DsplyMsg Network connection dropped during network logon. Retrying ... Jump 40 ! reset modem and try again ! !********* -LABEL 107 !---<Session disconnected Err>--- !********* Bell Alert 200 Network connection dropped during network logon.\13Try again. SetVar 4 0 ! clear # logon attempts counter Jump 40 ! reset modem and try again ! !********* -LABEL 108 !---<Validation fault>--- !********* IncVar 4 ! Increment # logon attempts counter IfVar 4 3 109 ! see if limit of 3 is exceeded. DsplyMsg Network rejected your identification. Retrying ... Wait 60 ! wait 1 sec Jump 100 ! retry GEIS login (only case where we don't reset) ! !********* -LABEL 109 !---<validation fault err>--- !********* Bell Alert 200 Your network identification has been rejected.\13Check Setup to make sure your identification is correct. SetVar 4 0 ! clear # logon attempts counter Jump 40 ! reset modem and try again ! !********* -LABEL 110 !---<Denied by host>--- !********* IncVar 4 ! Increment # logon attempts counter IfVar 4 3 111 ! if 3 attempts, display Network Problem alert DsplyMsg Network host equipment problem detected. Retrying ... Jump 40 ! reset modem and try again ! !********* -LABEL 111 !---<Denied by host err>--- !********* Bell Alert 200 Network host equipment problem detected.\13Try again. SetVar 4 0 ! clear # logon attempts counter Jump 40 ! reset modem and try again ! !********* -LABEL 112 !---<MARK3K access busy/down>--- !********* IncVar 4 ! Increment # logon attempts counter IfVar 4 3 113 ! if 3 attempts, display Network Busy alert DsplyMsg Network equipment busy/down. Retrying ... Jump 40 ! reset modem and try again ! !********* -LABEL 113 !---<MARK3K access busy/down err>--- !********* Bell Alert 200 Network equipment busy or down.\13Try again. SetVar 4 0 ! clear # logon attempts counter Jump 40 ! reset modem and try again ! !================================================================================ -LABEL 120 !***<MARK3000 prompt>*** Invoke CICS !================================================================================ ! DsplyMsg Requesting access to network subsystem ... DsplyPic 4 Wait 6 ! wait 0.1 secs Flush ! clear input buffer ! Xmit ~CICS\13 ! Look for one of the following expected responses MatchStr 3 140 READY ! To overcome a network problem, the following label was changed from 124 to 126 ! MatchStr 4 124 T BOUND MatchStr 4 126 T BOUND MatchStr 5 126 UNRECOGN MatchStr 6 126 ===> Wait 3600 ! Allow 60 secs for the expected responses to show up IncVar 5 ! Timeout, so increment # CICS tries counter IfVar 5 2 122 ! if 3 tries, display No Response alert DsplyMsg No response to network subsystem request. Retrying ... Jump 40 ! reset modem and try again ! !********* -LABEL 122 !---<No CICS err>--- !********* Bell Alert 200 No response to network subsystem request.\13Try again. SetVar 5 0 ! clear # CICS tries counter Jump 40 ! reset modem and try again ! !********* -LABEL 124 !---<Session not bound err>--- !********* Bell Alert 200 Network CICS subsystem needs to be started.\13Please contact the Apple USA helpline immediately. Jump 200 ! jump to cancel routine ! !********* -LABEL 126 !---<Invalid application>--- !********* IncVar 5 ! Increment # CICS tries counter IfVar 5 3 127 ! if 3 tries, display Invalid Application alert DsplyMsg Network subsystem request has been rejected. Retrying ... Wait 60 ! wait 1 sec Flush Jump 120 ! try to access CICS again ! !********* -LABEL 127 !---<Invalid application err>--- !********* Bell Alert 200 The network subsystem request has been rejected.\13Try again. SetVar 5 0 ! clear # CICS tries counter Flush Jump 40 ! reset modem and try again ! !================================================================================ -LABEL 140 !***<CICS ready>*** Start APPM transaction !================================================================================ ! DsplyMsg Requesting access to distribution center ~Dist ... DsplyPic 5 ! Highlight box 5 on screen SetVar 5 0 ! clear # CICS tries counter ! ! Send what needs to be sent Xmit ~Epgm~Dist\13 ! Look for one of the following expected responses Wait 12 ! wait 0.2 secs Flush ! clear input buffer ! Look for one of the following expected responses MatchStr 3 160 C100 MatchStr 4 144 INVALID Wait 3600 ! Allow 60 secs for the expected responses to show up ! IncVar 6 ! Timeout, so Increment # APPM tries counter IfVar 6 2 142 ! if 2 tries, display No Transaction alert DsplyMsg No response to distribution center access request. Retrying ... Jump 40 ! reset modem and try again ! !********* -LABEL 142 !---<No transaction response>--- !********* Bell Alert 200 No response to distribution center access.\13Try again. SetVar 6 0 ! reset # APPM tries counter Jump 40 ! reset modem and try again ! !********* -LABEL 144 !---<Invalid transaction>--- !********* IncVar 6 ! Increment # APPM tries counter IfVar 6 2 145 ! if 2 tries, display Invalid Transaction alert DsplyMsg Distribution center access request rejected. Retrying ... Jump 40 ! reset modem and try again ! !********* -LABEL 145 !---<Invalid transaction err>--- !********* Bell Alert 200 Distribution center access request rejected.\13Check Setup to make sure your identification is correct. SetVar 6 0 ! reset # APPM tries counter Jump 40 ! reset modem and try again ! !================================================================================ -LABEL 160 !***<Online>*** !================================================================================ ! Wait 60 ! wait 1 sec DsplyMsg Accessing the distribution center ~Dist ... DsplyPic 6 ! Highlight box 6 on screen ! C9 = pass msg thru GE, 899 = Echo cmd Xmit C9899Ole\13 ! Look for one of the following expected responses MatchStr 2 162 C5 MatchStr 3 164 Ole\13 Wait 7200 ! wait 2 minutes for echo back or distribution center nonavail msg ! !********* -LABEL 162 !---<no luck this time>--- !********* DsplyMsg Distribution center is not available ... Jsr 180 ! terminate session Bell Alert -1 Distribution center is not available.\13Please try again later. Jump 200 ! exit to Cancel routine ! !********* -LABEL 164 !---<Success, but did MNP sync up?>--- !********* ! ! CTBCHECKPARAMETER <ParameterName> <ValueToCheckAgainst> ! <LabelIfMatch> [<LabelIfParameterNotFound>] [<LabelIfError>] CTBCheckParameter MNPStatus On 170 168 169 CTBCheckParameter MNPStatus Off 165 168 169 CTBCheckParameter MNPStatus Connecting 166 168 169 CTBCheckParameter MNPStatus Disconnecting 167 168 169 ! DisplyMsg Error in Communications Jsr 180 ! terminate session Bell Alert -1 Warning: The MNP Status is unknown.\13The session has been terminated. Jump 200 ! exit to Cancel routine ! !********* -LABEL 165 !---<MNP Status was Off>--- !********* DisplyMsg Error in Communications Jsr 180 ! terminate session Bell Alert -1 Warning: The MNP Status is Off.\13The session has been terminated. Jump 200 ! exit to Cancel routine ! !********* -LABEL 166 !---<MNP Status was Connecting>--- !********* DisplyMsg Error in Communications Jsr 180 ! terminate session Bell Alert -1 Warning: The MNP Status is Connecting.\13The session has been terminated. Jump 200 ! exit to Cancel routine ! !********* -LABEL 167 !---<MNP Status was Disconnecting>--- !********* DisplyMsg Error in Communications Jsr 180 ! terminate session Bell Alert -1 Warning: The MNP Status is Disconnecting.\13The session has been terminated. Jump 200 ! exit to Cancel routine ! !********* -LABEL 168 !---<MNP Status was not recognized>--- !********* DisplyMsg Error in Communications Jsr 180 ! terminate session Bell Alert -1 MNPStatus was not recognized as a valid parameter.\13Call the Apple USA HelpLine. Jump 200 ! exit to Cancel routine ! !********* -LABEL 169 !---<CTBCheckParameter error>--- !********* DisplyMsg Error in Communications Jsr 180 ! terminate session Bell Alert -1 An error occurred in the CTBCheckParameter function.\13Call the Apple USA HelpLine. Jump 200 ! exit to Cancel routine ! !********* -LABEL 170 !---<Success, we’re in, so exit>--- !********* Wait 30 ! wait 0.5 secs Flush ! clear input buffer Exit 0 ! exit the script normally ! !================================================================================ -LABEL 180-199 !***<Terminate Session>*** !================================================================================ ! !********* -LABEL 180 !---<Terminate session>--- !********* ! send Abnormal disconnect command Xmit C3\13 ! Look for one of the following expected responses MatchStr 1 182 U# Wait 300 ! wait 5 secs Return ! !********* -LABEL 182 !---<Say bye>--- !********* Wait 6 ! wait 0.1 sec and sign off the network Xmit BYE\13 Return ! !================================================================================ -LABEL 200 !***<Cancel Routine>*** !================================================================================ DsplyMsg Canceling ... Flush Wait 30 ! wait 0.5 secs Exit -1 ! exit the script with an error ! !================================================================================ -LABEL 210 !***<Hang up phone Routine>*** !================================================================================ ! ! Look for one of the following expected responses MatchStr 1 222 CARRIER SetVar 1 0 ! clear # hangup tries counter SetVar 2 0 ! clear # modem config tries counter and reuse for MNPStatus checks ! If MNP is on, turn it off first or the modem will not understand the Hangup command ! ! CTBCHECKPARAMETER <ParameterName> <ValueToCheckAgainst> ! <LabelIfMatch> [<LabelIfParameterNotFound>] [<LabelIfError>] CTBCheckParameter MNPStatus Off 220 168 169 CTBCheckParameter MNPStatus Connecting 212 168 169 CTBCheckParameter MNPStatus Disconnecting 213 168 169 ! CTBPARAMETER <ParameterName> <NewValue> [<LabelIfError>] CTBParameter MNPStatus Off 215 ! MNP was on, so turn it off ! Check it again, just in case CTBCheckParameter MNPStatus Off 220 168 169 Jump 220 ! MNP turned off OK, so finish hanging up ! !********* -LABEL 212 !---<MNPStatus is Connecting>--- !********* IncVar 2 ! Increment # MNPstatus checks counter IfVar 2 3 214 ! if 3 checks, display alert and exit script with error Alert 200 MNPStatus is Connecting. Wait 30 ! wait 0.5 secs Jump 210 ! try to hang up again ! !********* -LABEL 213 !---<MNPStatus is Disconnecting>--- !********* IncVar 2 ! Increment # MNPstatus checks counter IfVar 2 3 214 ! if 3 checks, display alert and exit script with error Alert 200 MNPStatus is Disconnecting. Wait 30 ! wait 0.5 secs Jump 210 ! try to hang up again ! !********* -LABEL 214 !---<MNPStatus is Connecting or Disconnecting>--- !********* Alert 200 MNPStatus is still Connecting or Disconnecting.\13Script exiting with an error. Exit -1 ! exit the script with an error ! !********* -LABEL 215 !---<CTBParameter Error>--- !********* Alert 200 CTBParameter MNPStatus Off caused an error.\13Call the Apple USA HelpLine. Exit -1 ! exit the script with an error ! !********* -LABEL 220 !---<Hang up the phone subroutine>--- !********* ! Close, (pause), then reopen the connection - the NetModem™ will hangup ! CTBClose Wait 60 CTBOpen Return ! !================================================================================ -LABEL 230-239 !***<UNUSED>*** !================================================================================ ! !================================================================================ -LABEL 240 !***<Disconnection Sequence>*** !================================================================================ ! ! Just flush and exit, the connection will automatically close, ! and NetModem™ will hangup the line. ! Flush ! clear input buffer Exit 0 ! exit the script normally ###