Article Title : xremote_modems Creation Date : unknown Author : unknown Last Update : 3-8-94 Last Update By : NCD Technical Support Expiration Rules : ============================================================================= XRemote Modem Settings Below are the suggested settings for the modem that the NCD is connected to. Generally the modem on the NCD side should be set so it negotiates the connection parameters. But it is possible for the host modem to force the connection to the 'wrong' parameters sometimes, so if these settings do not work properly, check the host modem. The host modem may need to be set so it answers the incoming call. One can verify that the XRemote connection is 'clean' and working well. Once the XRemote session is established, press the 'Setup' key and press the button for 'Network Statistics'. Statistics will be displayed that show any errors; these should close to zero on a clean line. Return to the 'Main Menu' by pressing that button, and then press the 'XRemote Statistics'. These statistics should have low numbers for any Error statistics as well as the 'xmtRetransmissions' and 'rcvOutOfSequence'. The most important single statistic is the 'roundTripTime', which should be in the 300-500 range. This figure is a general measure of the interactive responsiveness. If the host response appears sluggish, and this figure is over 500, check the modem settings and other statistics. A note on host stty settings: the host tty port must be able to pass 8-bit characters. On a Sun, the command 'stty pass 8' sets this if necessary. General Modem Settings Hints The main goal of the modem settings is to configure as clean a line as possible between the NCD and the host. This means V.32, 9600 baud, no MNP, no XON/XOFF flow control, and no compression of data by the modem. By design, the NCD XRemote protocol has very small headers, compresses the X data and provides error correction and retransmission of packets. A note on the Telebit T1000: this modem may be used, but the full speed of XRemote will not be achieved since this modem does not support 9600 baud V.32 connections. Specific Modem Settings The example settings below are based on customer feedback and NCD experimentation. Please send any corrections to this list to support@ncd.com. 1- Fastcomm FDX 9696 Series 2- Telebit T2500 3- Telebit T1600 4- Telebit T3000 5- US Robotics Courier HST Dual Protocol v.32 v.32bis v.42bis 6- AT&T Paradyne 3820 7- Xeba Quicktel 14400 v.32bis/v.42bis modem 8- Codex 362x V.FAST modem 9- MultiTech MultiModemII MT932 modem 10-Telebit WorldBlazer 1- Fastcomm FDX Series FastComm Communications Corp., Reston, VA (703) 620-3900 Fastcomm 9696 Commands: Suggestions from a customer: NCD side: at &f #x0 &h1 &i1 &m0 &n6 &w Host side: at &f ats0=2 &w Summary of some useful commands: at&v view all settings (useful for verifying values) at&f set factory defaults at#x0 XON/XOFF (0=disable, 1=enable) at&h1 transmit flow control (0=none, 1=cts) [either value is ok] at&i1 receive flow control (0=none, 1=rts) [either value is ok] at&m0 sync/MNP mode (0=none) at&n6 baud (0=auto-baud, 6=9600) at&w write values to NVRAM ats0=2 auto answer ring count (0=never, 1=1 ring, etc.) [this only needs setting on the host modem] 2- Telebit T2500 Suggestions from a customer: NCD side: at &f s50=6 s51=4 s54=3 s55=3 s58=0 &w Host side: at &f s51=4 s52=1 s54=3 s64=1 s66=1 &w Summary of some useful commands: atn? display all settings (useful for verifying values) atv0 verbose (0=number, 1=english) at&f factory defaults at&k0 flow control (0=none, 3=RTS/CTS full duplex) at&q0 MNP (0=none) ats50=6 modem-modem baud (0=auto, 6=9600, 255=FAST (PEP)) ats51=4 modem-NCD baud (4=9600, 254=auto (19.2K default)) ats58=0 flow control (0=none, 1=RTS/CTS half duplex, 2=RTS/CTS full duplex, 3=XON/XOFF) ats68=2 flow control by DCE (0=none, 2=R/C, 3=XON/XOFF, 255=use s58) ats95=0 MNP (0=disabled, 1=reliable, 2=auto reliable) ats96=0 MNP compression (0=disabled, 1=enabled) at&w write values to NVRAM 3- Telebit T1600 Suggestions from a customer: NCD side: at &f s50=6 s51=4 s58=0 s180=0 s190=0 &w Summary of some useful commands: at&f factory defaults at&v view settings atn? display all settings (useful for verifying values) ats50=6 modem-modem baud rate (6=9600, V.32) ats51=4 DTE baud rate (4=9600) ats58=0 DTE flow control (0=none, 1=RTS/CTS half duplex, 2=RTS/CTS full duplex, 3=XON/XOFF) ats60=0 data format (0=7-bit, 2=8-bit, even parity) ats180=0 error control request (0=disabled) ats190=0 data compression (0=none, 1=enabled) 4- Telebit T3000 Suggestions from a customer: NCD side: at &f s50=6 s51=4 s58=0 s180=0 s190=0 &w Summary of some useful commands: at&f factory defaults at&v view settings atn? display all settings (useful for verifying values) ats50=6 modem-modem baud rate (6=9600, V.32) ats51=4 DTE baud rate (4=9600) ats58=0 DTE flow control (0=none, 1=RTS/CTS half duplex, 2=RTS/CTS full duplex, 3=XON/XOFF) ats60=0 data format (0=7-bit, 2=8-bit, even parity) ats180=0 error control request (0=disabled) ats190=0 data compression (0=none, 1=enabled) 5- US Robotics Courier HST Dual Protocol v.32 v.32bis v.42bis U.S. Robotics 8100 North McCormick Blvd. Skokie Ill, 60076-2920 Sales Phone Number: 1-800-342-5877 Tech Support Number: 1-800-982-5151 NCD Side Set the following: AT&A3 AT&B1 AT&H3 AT&M0 AT&N0 ( AT&N6 for fastcomm 9600 baud compatibility ) Note &N may need to be set to "6" to ensure 9600 baud operation (e.g. at&n6) and &B may need to be set to 1 to ensure DTE baud rate matching (e.g. at&b1). Aslo you may want to set the modem flow control by using the &H3 setting for compatibility with non Xremote uses of the remote and/or host side modem. Output of the atI4 command (displays the current modem settings): B0 C1 E1 F1 M1 Q0 V1 X1 BAUD=9600 PARITY=N WORDLEN=8 DIAL=TONE ON HOOK TIMER &A3 &B1 &C1 &D2 &G0 &H3 &I0 &K1 &L0 &M0 &N0 &P0 &R1 &S0 &T5 &X0 &Y1 %R0 S00=000 S01=000 S02=043 S03=013 S04=010 S05=008 S06=002 S07=060 S08=002 S09=006 S10=007 S11=070 S12=050 S13=000 S14=001 S15=000 S16=000 S17=000 S18=000 S19=000 S20=000 S21=010 S22=017 S23=019 S24=150 S25=000 S26=001 S27=000 S28=008 S29=020 S30=000 S31=000 S32=001 S33=000 S34=000 S35=000 S36=000 S37=000 S38=000 Host Side: The host side USRobotics modem should use the default settings with one DIP switch change. The DIP Switch should be changed to enable Auto Answer. DIP switch number 5 is the Auto Answer switch. Also the AT&B1 and AT&H1 options should be set to ensure DTE/DCE baud rate matching and non XRemote flow control operation. Enable mode for Auto Answer is DIP Switch # 5 "UP". AT&B1 ( DCE/DTE data rate is locked to DCE/DTE speed ) AT&H1 ( enables flow control for non Xremote operation) 6- AT&T Paradyne 3820 NCD Side Set the following: AT\N0 (Error Control Buffer Mode no error control) AT%C0 (MNP 5 Data Compression Disabled) AT"H0 (v.42bis Compression Disabled) Host Side Set the following: AT&f (Factory Defaults) 7- Xeba Quicktel 14400 v.32bis/v.42bis modem Quicktel 14400 v.32bis/v.42bis modem Part Number: m144xv Logicode Technology, INC. 1817 DeHavilland Dr. Newbury Park, CA 91320 (805) 499-4443 NCD Side Set the following: AT&M0 (No MNP) AT%C0 (modem rs232 speed will trace input device rs232 speed) AT\N0 (No Data compression) Host Side Set the following: ATS0=1 (Auto-Answer on 1 ring) 8- Codex 362x V.FAST modem Motorola Codex 20 Cabot Boulevard Mansfield, MA 02048-1193 (508) 261-4000 NCD Side Set the following: AT*SM1 (No MNP, No Data Compression, and No v.42bis) AT*XC2 (Extended Results Code) Host Side Set the following: AT*AA1 (Auto-Answer on 1 ring) 9- Multi-Tech MultiModemII MT932 modem Multi-Tech Systems, Inc. 2205 Woodale Dr. Mounds View, Minnesota 55112 (612) 785-3500 (800) 328-9717 FAX (612) 785-9874 BBS (612) 785-9875 NCD Side Set the following: AT&E0 (No MNP, No Data Compression, and No v.42bis) Host Side Set the following: ATS0=1 (Auto-Answer on 1 ring) 10- Telebit WorldBlazer Suggestions from a customer: NCD side: at &f x11 s50=254 s58=0 s180=0 s190=0 &w Host side: at &f E0 Q1 &C1 &D3 &R2 &S4 s0=1 s2=255 s51=252 s61=0 s64=1 &w *** DO NOT USE PEP OR TURBOPEP. Xremote will be much slower in PEP mode *** Summary of some useful commands: at&f factory defaults at&v view settings ate0 disable Command Echo atq1 disable results code output atx11 extended connect data atn? display all settings (useful for verifying values) ats50=254 modem-modem baud rate (0=autobaud, 6=9600, 254=NO-PEP V.32bis) ats51=252 DTE baud rate (4=9600, 252=autobaud) ats58=0 DTE flow control (0=none, 1=RTS/CTS half duplex, 2=RTS/CTS full duplex, 3=XON/XOFF) ats61=0 Local Action on Break process as defined in s63 ats64=1 Abort dialing on answer ats180=0 error control request (0=disabled) ats190=0 data compression (0=none, 1=enabled) Example of at&v output for NCD side WorldBlazer modem: WorldBlazer - SA - Version LA7.02 - Active Configuration B1 E1 L2 M1 P Q0 V1 X11 Y0 &C0 &D0 &G0 &J0 &L0 &Q0 &R3 &S0 &T4 &X0 S000=0 S001=0 S002=43 S003=13 S004=10 S005=8 S006=2 S007=60 S008=2 S009=6 S010=14 S011=70 S012=50 S018=0 S025=5 S026=1 S038=0 S041=0 S045=0 S046=0 S047=4 S048=0 S050:254 S051=252 S056=17 S057=19 S058:0 S059=0 S060=0 S061=1 S062=15 S063=0 S064=0 S068=255 S069=0 S090=0 S092=0 S093=8 S094=1 S100=0 S104=0 S105=1 S111=255 S112=1 S113=126 S114=0 S115=0 S151=4 S155=0 S180:0 S181=1 S183=25 S190:0 S191=7 S253=10 S254=255 S255=255 Example of at&v output for HOST side WorldBlazer modem: WorldBlazer - SA - Version LA7.02 - Active Configuration B1 E0 L2 M1 P Q2 V1 X1 Y0 &C1 &D3 &G0 &J0 &L0 &Q0 &R2 &S4 &T4 &X0 S000:1 S001=0 S002:255 S003=13 S004=10 S005=8 S006=2 S007=60 S008=2 S009=6 S010=14 S011=70 S012=50 S018=0 S025=5 S026=1 S038=0 S041=0 S045=0 S046=0 S047=4 S048=0 S050=0 S051:254 S056=17 S057=19 S058=3 S059=0 S060=0 S061:0 S062=15 S063=0 S064:1 S068=255 S069=0 S090=0 S092=0 S093=8 S094=1 S100=0 S104=0 S105=1 S111=255 S112=1 S113=126 S114=0 S115=0 S151=4 S155=0 S180=2 S181=1 S183=25 S190=1 S191=7 S253=10 S254=255 S255=255