The Columbia University
High-Speed Dial-up Modem Pool
Technical terms are explained in a companion document, Modem Protocols Explained.
The dialin modem pool consists of 122 US Robotics (USR) Courier V.32bis (14400 bps) plus 32 USR Courier V.34 (28800 bps) high-speed modems. You can reach the new modem pool by calling these numbers:
212 854-9924 <-- V.32bis entry, hunts to V.34. 212 853-9903 <-- V.34 entry, does not hunt.The old low-speed ROLM-based modem pool remains available for fallback purposes, but at reduced capacity and support. The numbers are:
212 854-1812 <-- ROLM entry, hunts to 854-9924 212 854-1824 <-- ROLM entry, hunts to 854-9924If you call any of these numbers and get a busy signal, it means all lines are busy. Peak usage hours are between about 10am and 2am.
The remainder of this document describes the high-speed modem pool. The low-speed, ROLM-connected modems are a holdover from earlier days, and are described elsewhere. The old pool is being deemphasized because it does not support high speeds, error correction, data compression, or flow control. However, the old pool is still our only dialout modem pool.
These modems are attached at 57600 bps to Cisco terminal servers that are connected directly to Columbia's TCP/IP campus network as well as to some Rolm data lines. This gives you terminal access to Columbia's TCP/IP-based hosts and services, to Rolm-connected computers, and it gives you IBM 3270 protocol conversion for connecting to Columbia's IBM mainframes. It also gives you SLIP and PPP access to the Internet, which is described in a separate document.
The US Robotics (USR) modems support the following types of connections:
Modulation Connection Speed Fallback ITU-T V.34 28800 bps 26400 -> 24000 -> ... -> V.32bis ITU-T V.32bis 14400 bps 12000 -> 9600 -> 7200 bps -> V.32 ITU-T V.32 9600 bps 4800 bps -> V.22bis ITU-T V.22bis 2400 bps Bell 212A Bell 212A 1200 bps Bell 103J Bell 103J 300 bps 110 bpsThe interface speed on all the modem-pool modems is fixed at 57600 bps, but the interface speed of the modem you are calling from can be anything at all; the modems will provide any needed speed conversion. For best results, you should set your communication software to use the highest speed available to it, 57600 bps or lower (57600 bps, 38400 bps, 19200 bps, etc), that is also compatible with your modem and fix your modem's interface speed to the same value (see your modem manual), and set your modem and communication software for hardware (RTS/CTS) flow control.
Please send reports of success (or failure) for other types of modems to consultant@columbia.edu.
Table 1 - Modems Reportedly Compatible with the Modem Pool
.........NEGOTIATED FEATURES.......... MODEL MODULATION ERROR-CONTROL COMPRESSION * AT&T Paradyne DataPort 14400 V.32bis V.42 V.42bis Bocamodem 14.4K V.32bis V.42 V.42bis Gateway Telepath External V.32bis V.42 V.42bis * Hayes 1200 V.22 none none * Hayes 2400 V.22bis none none * Hayes Ultra 144 V.32bis V.42 V.42bis Intel 14400 Fax/Modem V.32bis V.42 V.42bis Modular Circuit Tech MCT-144IF+ V.32bis V.42 V.42bis * Multitech MT1432 V.32bis V.42 V.42bis PowerPort Gold (in Mac PowerBook) V.32bis V.42 V.42bis Practical Peripherals SA9600 V.32 V.42 V.42bis * Practical Peripherals PM14400FXSA V.32bis V.42 V.42bis * Practical Peripherals PM14400FXMT V.32bis V.42 V.42bis * Racal-Vadic 9632VP (V.32/MNP) V.32 MNP4 MNP5 SupraFaxModem V.32bis V.32bis V.42 V.42bis * Telebit Qblazer V.32 V.42 V.42bis Telebit T1600 V.32 V.42 V.42bis * Telebit T2500 V.32 none none * Telebit T3000 V.32bis V.42 V.42bis * Telebit TrailBlazer V.22bis none none * US Robotics Courier V.32bis ASL V.32bis V.42 V.42bis * US Robotics Sportster 14400 FAX V.32bis V.42 V.42bis * US Robotics Sportster 28800 FAX V.34 V.42 V.42bis Worldport 2496 Fax/Data V.22bis none none
We do not know the details of operation of every kind of modem in the world. It might be necessary for you to consult your modem manual for details of operation of your modem.
MODEM COMMANDS REMARKS AT&T DataPort 14400 \N7 V.42 ->. MNP ->. buffered Digicom Connection 144+ \N5 V.42 ->. MNP ->. buffered Hayes 2400, 1200 V.42 & MNP not available Hayes ULTRA 9600 or 144 &Q5 S36=7 S46=138 S48=7 V.42 ->. MNP ->. buffered Multitech MT1432 &E1 &E15 $BA0 V.42 ->. MNP ->. buffered Practical Peripherals 14400 &Q5 S36=7 V.42 ->. MNP ->. buffered Practical Peripherals 9600 &Q5 S36=7 V.42 ->. MNP ->. buffered Telebit T3000, T1600 S180=2 S181=1 V.42 ->. MNP ->. buffered Telebit WorldBlazer, QBlazer S180=2 S181=1 V.42 ->. MNP ->. buffered Telebit T2500 &Q5 S36=1 MNP ->. buffered Telebit TrailBlazer V.42 & MNP not available USR Sportster &M4 V.42 ->. MNP ->. buffered Zoom 14400 V.32bis &Q5S36=7 V.42 ->. MNP ->. buffered
Compression can (and should) be used with the new modem pool (but need not be). Supported techniques are ITU-T V.42bis and MNP Level 5. Compression is possible only when error correction is also enabled. Here are some sample commands for enabling compression on various types of modems.
MODEM COMMANDS REMARKS AT&T DataPort 14400 %C1 V.42bis ->. MNP 5 **Digicom Connection 144+ %C1 V.42bis ->. MNP 5 Hayes 2400, 1200 N/A Not available Hayes ULTRA 9600 &Q5 S36=7 S46=138 S48=7 V.42bis ->. MNP 5 Multitech MT1432 &E1 &E15 $BA0 V.42bis ->. MNP 5 Practical Peripherals 14400 S46=2 V.42bis ->. MNP 5 Practical Peripherals 9600 S46=2 V.42bis ->. MNP 5 Telebit T3000, T1600 S190=1 V.42bis ->. MNP 5 Telebit WorldBlazer, QBlazer S190=1 V.42bis ->. MNP 5 Telebit T2500 S95=2 MNP ->. none USR Sportster &K1 V.42bis ->. MNP 5 Zoom 14400 V.32bis &Q5S36=7 V.42bis ->. MNP 5**Depends on what software is loaded in the modem.
To take full advantage of compression, you should set your modem and your communication software to use an interface speed that is higher (by at least a factor of 2, and preferably 4) than the connection speed. For example, if you make a V.32bis 14400 bit-per-second connection, and the modems are able to compress data by a factor of four, your interface speed should be set to 57600 bits per second.
In general, you should configure your modem to use the highest interface speed that it reliably supports, and to "lock" the interface speed; that is, not to change the interface speed based on the connection speed (as most modems do automatically based on their factory configurations). The method for setting and locking a high communication speed varies from modem to modem, and might involve more than one parameter. Please read your modem manual carefully.
And of course, you must also set your communication software to use the same speed as your modem's interface speed; for example, in MS-DOS Kermit, "SET SPEED 57600".
NOTE: Interface speeds in excess of 57600 bps are not presently recommended, as they are not reliably and consistently implemented in many types of computers and modems, and because 57600 is the modem pool speed, so higher speeds on the calling end buy you nothing.
Here is just one example: the telephone connection is very noisy, so there must be frequent retransmissions between the two modems. While the modems are busy retransmitting, you can't keep sending more data into them indefinitely. Eventually their buffers will fill up, and they must have the ability to stop the flow of data. Otherwise data will be lost.
The most effective form of flow control is hardware flow control, which uses special wires, separate from the data wires, to signal stop and start requests. The most common form of hardware flow control is called RTS/CTS (Request to Send / Clear to Send), and should be supported by any modem that also supports error correction and compression. For RTS/CTS flow control to be effective, the cable that connects the modem to your PC (see below about Macintoshes) must include wires for these signals.
A second method of flow control is called "software flow control". It is accomplished by embedding special characters in the data stream. These characters are called XOFF (Control-S) and XON (Control-Q). XOFF means "stop sending" and XON means "resume sending". Software flow control is inferior to hardware flow control for several reasons:
Note that flow control should be enabled in both directions (PC-to-modem and modem-to-PC); some modems require you to enable flow control in each direction separately.
You must enable flow control in your modem AND in your communication software so the PC and the modem agree about how flow control will be done. Here is how to enable hardware flow control in several types of modems:
MODEM INPUT OUTPUT AT&T DataPort 14400 \Q3 \Q3 Digicom Connection 144+ &K3 &K3 Hayes 2400, 1200 Hardware Flow Control Not Available Hayes ULTRA 9600 &K1 &K3 Hayes ULTRA 144 &K3 &K3 Multitech MT1432 &E4 &E4 Practical Peripherals 14400 &K3 &K3 Practical Peripherals 9600 &K3 &K3 Telebit T3000 or T1600 S58=2 S68=2 Telebit WorldBlazer or QBlazer S58=2 S68=2 Telebit T2500 S58=2 S68=2 Telebit TrailBlazer S58=2 S58=2 (same register governs both) USR Sportster &R2 &H1 Zoom 14400 V.32bis &K3 &K3(See below for the corresponding Kermit software commands.)
As noted above, our present terminal servers support hardware flow control in only one direction: the modem can stop data from the terminal server, but the terminal server cannot stop data from the modem because its interface lacks the RTS wire. Problems can occur when you are pushing voluminous amounts of data at high speeds into the terminal server, for example when uploading a file to a host computer from your PC using a streaming protocol (like Kermit with sliding windows, or Zmodem). Data loss can occur because the terminal server is overloaded, the network behind the terminal server is overloaded, or the destination host computer is overloaded. Without an RTS signal, the terminal server has no way to pass the "back pressure" on to the modem.
If you experience problems uploading files through the new modem pool, try using shorter packets or a smaller window size (assuming you are using Kermit). Here is a sample configuration for C-Kermit on the UNIX hosts for receiving files that you are uploading:
set window 2 ; (or 1) set receive packet-length 700 ; (or lower)Eventually, the modems will be attached to a terminal server that offers hardware flow control in both directions, and uploading problems (if you are having them) should vanish.
AT&T Paradyne DataPort 14400 (NOT DataPort Express):
Connect at 57600 bps and give the following AT commands:
ATX6 Extended result codes when dialing AT%B14400 14400 bps connection speed ATS41=1 V.32bis modulation ATS78=0 Fallback enabled AT\Q3 RTS/CTS hardware flow control AT\N7 Error correction enabled, negotiated AT%C1 Compression enabled, negotiated AT\K5 Nondestructive, nonexpedited BREAK handling
Digicom Connection 144+ or 96+
Connect at 57600 bps and give the following AT commands:
ATX4 Extended result codes when dialing AT&K3 RTS/CTS hardware flow control AT\N5 Error correction enabled, negotiated AT%C1 Compression enabled, negotiated
Hayes ULTRA 144:
Connect at 38400 bps and give these AT commands:
ATX4W1 Extended result and progress codes when dialing ATS87=28 Fix interface speed ATS37=11 Begin modulation negotiation at V.32bis, 14400 bps ATN1 Allow modulation fallback AT&K1 Input flow control = RTS AT&K3 Transmit flow control = CTS AT&Q5 Error correction enabled ATS36=7 Enable error correction fallback ATS46=2 Compression enabled ATS48=7 Enable compression and error correction negotiation ATS82=128 Nondestructive, nonexpedited BREAK handling
Multitech MT1432 Series
Connect at 57600 bps and give these AT commands:
AT&Q1X4 Extended result codes when dialing AT$SB57600 Lock interface speed at 57600 AT$MB14400 Start modulation negotiation at 14400 AT$BA0 Speed buffering AT&E4 RTS/CTS hardware flow control AT&E1&E15 Error correction & compression enabled, negotiated AT%E1 Nondestructive, nonexpedited BREAK handling
Practical Peripherals 14400FXMT or 14400FXSA
Connect at 57600 bps and give these AT commands:
ATX4S95=47 Extended result codes when dialing ATN1S37=11 Modulation fallback enabled, begin at V.32bis AT&K3 RTS/CTS hardware flow control AT&Q5S36=7 Error correction enabled, negotiated ATS46=2 Compression enabled, negotiated ATS82=128 Nondestructive, nonexpedited BREAK handling
Practical Peripherals 9600, 9600SA, 9600FXMT
Connect at 38400 bps and give these AT commands:
ATX4S95=47 Extended result codes when dialing ATN1S37=9 Modulation fallback enabled, begin at V.32 AT&K3 RTS/CTS hardware flow control AT&Q5S36=7 Error correction enabled, negotiated ATS46=2 Compression enabled, negotiated ATS82=128 Nondestructive, nonexpedited BREAK handlingTelebit T3000, T1600, WorldBlazer, or QBlazer:
ATX12 Extended result codes when dialing ATS59=15 Show connection speed and interface speed separately ATS51=7 Fix interface speed at 57600 (or highest speed allowed) ATS50=0 Automatic determination of connection speed ATS94=1 Allow full modulation fallback ATS58=2 RTS/CTS output flow control ATS68=255 Input flow control same as output flow control ATS61=0 BREAK signal handled as specified in S63 ATS63=0 Send BREAK in sequence with data ATS180=2 Enable V.42 EC with fallback to MNP4 ATS181=1 If error control not negotiated, connect anyway ATS190=1 V.42bis compression enabled in both directions, fall back to MNP5
US Robotics Sportster or Courier:
Connect at 57600 bps and give these AT commands:
ATX4&A3 Extended result codes when dialing AT&B1 Fix interface speed AT&N0 Modulation fallback enabled AT&H1 Transmit flow control = CTS AT&R2 Input flow control = RTS AT&M4 Error correction enabled, negotiated AT&K1 Compression enabled, negotiated AT&Y3 Nondestructive, nonexpedited BREAK handling
Zoom 14400 V.32bis (not verified):
Connect at 57600 bps and give these AT commands:
ATX4S95=47 Extended result codes when dialing ATN1S37=11 Modulation fallback enabled AT&K3 RTS/CTS hardware flow control AT&Q5S36=7 Error correction enabled, negotiated ATS46=138 Compression enabled, negotiated ATS82=128 Nondestructive, nonexpedited BREAK handling
When connecting to Columbia's central services (UNIX systems or IBM mainframes), the recommended settings for DOWNLOADING are:
C-Kermit (UNIX, VMS): Kermit-CMS (VM/CMS):
SET WINDOW 5 (Use all defaults)
For UPLOADING, the recommended settings are:
C-Kermit (UNIX, VMS): Kermit-CMS (VM/CMS):
SET RECEIVE PACKET 700 SET RECEIVE PACKET 700
SET WINDOW 2
SET PORT 1 ; Or whichever serial port your modem is connected to. SET SPEED 57600 ; Or 38400 or 19200 if your modem doesn't support 57600. SET FLOW RTS/CTS ; Set this on your modem too! SET WINDOW 3 ; For fast file transfer... SET RECEIVE PACKET-LENGTH 1000MS-DOS Kermit 3.14 comes with dialing scripts for many of today's popular high-speed modems, including AT&T Paradyne, Hayes Ultra, Practical Peripherals, Multitech, Telebit, US Robotics, Zoom, etc. These scripts automatically set up both Kermit and your modem appropriately for dialing up our new modem pool. For further information about MS-DOS Kermit dialing scripts, see the file ~kermit/a/msmaaa.hlp on any of the CUNIX systems. This is also found in the MODEMS subdirectory of the MS-DOS 3.14 diskette as READ.ME.
SET MODEM name ; Name of your modem (HAYES, TELEBIT, etc) SET DIAL SPEED-MATCHING OFF ; Keep interface speed constant. SET PORT 1 ; Or whichever serial port your modem is connected to. SET SPEED 57600 ; Or 38400 or 19200 if your modem doesn't support 54600. SET FLOW RTS/CTS ; Set this on your modem too! SET WINDOW 3 ; For file transfer... SET RECEIVE PACKET-LENGTH 1000
SET WINDOW 3 SET RECEIVE PACKET-LENGTH 1000
Communication Port: MODEM or PRINTER, depending on your Mac model. Speed: 57600 Flow Control: DTR and CTS (see below) Window size: 3 Receive Packet-Length: 1000To use the internal modem ("PowerPort") on the Powerbook, use the Portable or PowerBook control panel (depending on whether you're using System 7.0 or 7.1) to switch between the internal modem and the external modem serial port. One user recommended the following PowerPort modem settings:
&F0 Initialize to factory settings V1 Full-word result codes \Q3 Bidirectional hardware flow control \J0 Fixed interface speed \N7 V.42 error correction with fallback to MNP %C1 Enable V.42bis data compression with fallback to MNPbut these have not been verified.
The Macintosh serial port is not an RS-232 device and does not support the full repertoire of modem signals needed for normal operation with modems. Communication with modems is accomplished using various "fakeouts", each of which sacrifices some feature in order to accomplish some other feature, since the Mac has only one modem signal to send to the modem, and reads only one modem signal from the modem. Thus, for example, the Mac can't hang up the phone by dropping DTR and use hardware flow control at the same time.
To have the ability to hang up the phone by dropping DTR, you need a regular Macintosh modem cable that connects the Mac's "Handshake Out" signal (Mini-Din-8 Pin 1) to the modem's DTR signal (DB25 pin 20), and the modem should be configured to hang up when DTR goes down. In Mac Kermit, you should NOT check "DTR input flow control" or "CTS output flow control".
To use hardware flow control with high-speed modems, you need:
Similarly, commercial and shareware communication software is not supported, even when it implements the Kermit protocol. Use it at your own risk, and obtain support from whoever you got it from.
212 854-9924 <-- V.32bis entry, hunts to 853-9903. 212 853-9903 <-- V.34 entry, does not hunt.For planning purposes, note that the dialin modem pool is most heavily used between the hours of 10:00am and 2:00am, and least heavily used between 3:00am and 10:am, and is used less heavily on weekends than on weekdays. Please don't use the modem pool for long periods of time unnecessarily, especially during peak hours. Note that there is a one-hour "idle timeout" -- your connection will be dropped automatically if an hour passes with no activity.
The configuration is:
Watts 62 USR V.32bis Watts2 60 USR V.32bis Watts3 32 USR V.34When the modem answers, you will see the "watts>", "watts2>", or "watts3>" prompt. The "watts>" or "watts2>" prompt means you are connected to a V.32bis modem; the "watts3" prompt means you are connected to a V.34 modem.
If you are having problems with your connection, type "sys" at the "watts>" (or "watts2>" or "watts3>") prompt, and take note of your "tty" number (yours is the one with an asterisk next to it). Include the prompt and the tty number when reporting problems, so we know which server and which line (and therefore which modem) is involved.
At the "watts>" or "watts2>" or "watts3>" prompt, you can type the name of any Columbia host computer or service that is reachable on our campus network, including departmental computers. Examples:
watts> columbianet watts> cunix watts> ctr watts> nnThe terminal servers have an escape character, Ctrl-^ (Control-Caret, normally typed as Ctrl-Shift-6). If you need to send this character through the terminal server, you must type it twice. If you need to upload data containing this character through the terminal server, it must be doubled or otherwise quoted or escaped; Kermit file transfers take care of this automatically UNLESS you have told the sending Kermit to SET CONTROL UNPREFIX 30 (30 is the ASCII code for Ctrl-^), or SET CONTROL UNPREFIX ALL. When uploading files to C-Kermit through the Watts terminal server, you must PREFIX at least 0, 3, 30, 131, and 158.
If you want to escape back to the Watts terminal server without breaking your connection, type Ctrl-^ followed by the letter x. Type "help" at the "watts>" prompt to learn about the commands and services available at the terminal server (but not all of them are necessarily enabled).
When you log out from the remote host or service, you will see the "watts>" or "watts2>" or "watts3>" prompt again. If you wish to connect to another host or service, type its name (as above). If you wish to terminate your dialup session, respond with "exit":
watts> exitThis should cause the modem connection to hang up.
One command is of special interest if you are having trouble transferring files through the Cisco:
TERMINAL DOWNLOADThis command disables the escape character, disables Xon/Xoff flow control, turns off all types of padding, and selects 8 data bits, no parity, and binary transmission mode, meaning all valid 8-bit characters are passed through transparently. In "download" mode, however, the Cisco is still sensitive to the BREAK signal, which gets you back to the Cisco prompt.
When you access a UNIX system ("cunix"), it will think that your terminal speed is 38400, no matter what your true connection speed is. If you are dialing in from a slow modem, say 1200 or 2400 bps, this can affect the operation of time-sensitive applications like EMACS, rn, and Kermit. So if you are dialing in at 1200 or 2400 bps, then as soon as you log in, you should give an "stty" command to let UNIX know what your true communication speed is, for example:
stty 1200
The connection from Watts, through the Rolm, to a Rolm-based host or service is at 19200 bps with no flow control (since the Rolm does not have any flow control capabilities).
To access an IBM mainframe such as CUVMB or CUVMC in fullscreen mode from the Watts terminal server, follow these steps:
term term h19
tn3270 simb tn3270 cuvmb
The 3270 keyboard mappings should be the same as when you "call simb" or "call simc" from the Rolm modem pool or a Rolmphone. The mappings are listed in Appendix I at the end of this document.
To check your Watts/Watts2/etc terminal settings -- which only matter if you are making tn3270 connections -- use the "show terminal", "show tty", and "show keymap" commands.
For file transfer during 3270 emulation, use Kermit with small packet sizes. Large packet sizes don't work due to a bug in Cisco's 3270 emulator; the bug has been reported to Cisco and will be fixed in a future release (10.3.2) of the terminal server software. Until the bug is fixed, you must use a packet size of 72 or less for downloading, 107 or less for uploading. To set the packet length, give the following command to Kermit-CMS prior to uploading:
SET RECEIVE PACKET-LENGTH 107and give the following command to your local Kermit program prior to downloading:
SET RECEIVE PACKET-LENGTH 72(If that doesn't work, use an even lower number, like 40; the number seems to vary with the time of day, how busy the terminal server is, etc.)
Also, for tn3270 connections, tell your local Kermit program to:
SET PARITY SPACEIf you have a frequent need to transfer files with the IBM mainframe, then it is probably better for you to access the mainframe via ColumbiaNet instead of through the Watts 3270 emulator, until such time as the Cisco bugs are fixed. In other words, at the Watts prompt, type "cnet" instead of "tn3270 simb". Then, in the ColumbiaNet menu, select "AcIS", and then "Connect to..." and then "CUVMB".
INPUT 10 \13\10watts ; Look for "Watts" on the left margin.
IF FAIL STOP 1 No watts prompt
INPUT 1 > ; Look for ">".
IF FAIL STOP 1 No watts prompt
This will match either "watts>", "watts2>", "watts3>, etc. See
Using MS-DOS Kermit
or
Using C-Kermit
to learn about Kermit script programming.
Please report any other problems to consultant@columbia.edu.
The following sources of information may or may not be useful. Since they are outside Columbia University, we have no control over their content (accuracy, timeliness, maturity, political correctness). Use at your own risk.
First the arrow or cursor-movement keys. These have a number of synonyms: EMACS-like control characters, plus the escape sequences sent by DEC or Heath terminal arrow keypads in various modes. In the following table, "VT100" means VT100 or higher (VT102, VT220, VT320, etc); "App" means Application Mode, "Cursor" means Cursor Mode, and "VT52/Heath" denotes DEC VT52 or Heath/Zenith-19 terminals. In other words, to produce the effect noted on the left, type any of the characters or sequences shown on the right, and if you have a DEC VT or Heath-19 or Zenith-19 terminal or emulator, you can also use the arrow keys (as noted below, the "Kermit Notation" is for use with Kermit's SET KEY command, and applies to the Control Character column -- MS-DOS Kermit also has "keyboard verbs" for the arrow keys: \Klfarr, \Krtarr, \Kuparr, and \Kdnarr, which take on the correct values automatically for each type of terminal in each mode):
Control Kermit Arrow-Key Escape Sequences.........
Character Notation VT100 App VT100 Cursor VT52/Heath
Cursor Left Ctrl-B \2 ESC O D ESC [ D ESC D
Ctrl-H \8
Backspace \8
Delete \127
Rubout \127
Cursor Right Ctrl-F \6 ESC O C ESC [ C ESC C
Cursor Up Ctrl-P \16 ESC O A ESC [ A ESC A
Cursor Down Ctrl-N \14 ESC O B ESC [ B ESC B
The remaining 3270 keyboard functions are entered using regular ASCII characters or sequences that are independent of your terminal type. You can type them as shown, or, if you have a PC, you can use MS-DOS Kermit's SET KEY command to map them to the desired function or other keys. For example, to assign the "Cursor Home" function to the PC's grey-keypad Home key, use "set key \4423 \22" (\4423 is the scan code of the Home key, \22 is the ASCII value of Ctrl-V).
Function Characters Kermit Notation
Cursor Home Ctrl-V \22
Horizontal Tab Ctrl-I (Tab) \9
Back Tab ESC Ctrl-I \27\9
Clear Screen Ctrl-L \12
Erase current line Ctrl-U or ESC Ctrl-K \21 or \27\11
Erase to end of line Ctrl-K \11
Erase All ESC Ctrl-U \27\21
Toggle Insert/Replace Mode Ctrl-X \24
Delete Character Forward Ctrl-D \4
Enter Ctrl-M, Return, Enter \13
Reset Ctrl-R \18
Redisplay Screen Ctrl-T \20
Sync Ctrl-G \7
Newline Ctrl-A or Ctrl-J \1 or \10
PA Key 1 Ctrl-C \3
PA Key 2 Ctrl-W \23
PA Key 3 Ctrl-O \15
PF Key 1 ESC 1 \{27}1
PF Key 2 ESC 2 \{27}2
PF Key 3 ESC 3 \{27}3
PF Key 4 ESC 4 \{27}4
PF Key 5 ESC 5 \{27}5
PF Key 6 ESC 6 \{27}6
PF Key 7 ESC 7 \{27}7
PF Key 8 ESC 8 \{27}8
PF Key 9 ESC 9 \{27}9
PF Key 10 ESC 0 \{27}0
PF Key 11 ESC - or ESC q \27\45 or \27q
PF Key 12 ESC = or ESC w \27= or \27w
PF Key 13 ESC ! or ESC e \27! or \27e
PF Key 14 ESC @ or ESC r \27@ or \27r
PF Key 15 ESC # or ESC t \27# or \27t
PF Key 16 ESC $ or ESC y \27$ or \27y
PF Key 17 ESC % or ESC u \27% or \27u
PF Key 18 ESC ^ or ESC i \27^ or \27i
PF Key 19 ESC & or ESC o \27& or \27o
PF Key 20 ESC * or ESC p \27* or \27p
PF Key 21 ESC ( or ESC a \27( or \27a
PF Key 22 ESC ) or ESC s \27) or \27s
PF Key 23 ESC _ or ESC d \27_ or \27d
PF Key 24 ESC + or ESC f \27+ or \27f
May 1, 1993: 10 Telebit T3000 V.32bis modems installed for evaluation. May 5, 1993: 8 US Robotics Courier V.32bis modems added, 18 modems total. Sep 11, 1993: Telebit modems retired, USR pool increased to 26 total. Oct 4, 1993: USR pool increased to 61 and 854-1896 connected to USR pool. Dec 15, 1993: USR pool increased to 82. Jan 21, 1994: USR pool reorganized, size remains at 82. Feb 11, 1994: USR pool expanded to 90. Nov 11, 1994: USR pool expanded to 122. Apr 17, 1995: 32 USR V.34 modems added at 853-9903 for a total of 154 modems.