ACCC Dialin Services

Notes:

• All ACCC dialup lines support data compression and error checking.
• All ACCC dialup lines use RTS/CTS (hardware flow control).
• All ACCC dialup lines have connect time limit: 5 hours on all except Dialin-Express, which is 10 minutes.
• At the ACCC dialup line's dialin-x> prompt, enter: help for more info or: motd for news. (Do this before you enter the ppp command.)
• Use telnet to login to your ACCC UNIX account; icarus and tigger's Internet host names are: icarus.uic.edu and tigger.uic.edu
• Use tn3270 to logon to ACCC CMS; its Internet host name is: UICVM.UIC.EDU

Any member the UIC community -- student, faculty, staff -- can use the ACCC dialup services. There are no ACCC or UIC charges involved in using them. Even so, there are two important reasons why you might not want to use them.

1. The ACCC will continue to monitor and improve these services, but it is impossible for us to keep up with the ever increasing demand for them.
2. If you live in the suburbs, the telephone company's per minute charge to connect to UIC 413 exchange can mount up very quickly.

The use of the ACCC dialup lines is a privilege, not a right. Be sure to disconnect when you're finished. Never use more than one line at a time and never give your ACCC netid (or userid) and password to anyone. Please review our policies regarding computer use and abuse.

• An Apple Macintosh or or Windows personal computer, a modem, and a telephone line.
• A netid and account on tigger, icarus, or mailserv.
• We also recommend our Network Service Kit, a collection of network applications.

Modem requirements:

modem specifications: CCITT V.32-bis for 14.4 Kbps, CCITT V.34 for 28.8 Kbps and 33.6 Kbps. (Note that some modems don't follow V.34 for 28.8 Kbps connections; if yours doesn't, it may not work.)

error correction: none, V.42 (LAP-M), or MNP Class 2 through 4

data compression: none, V.42-bis, or MNP Class 5

Modem Settings:

• Your modem must have hardware (CTS modem-initiated) flow control enabled.
• Use eight (8) data bits and NO (or NONE) parity.
• Use RTS/CTS, hardware flow control.

When you connect with V.42 compression, the maximum effective throughput for a 14.4 Kbps modem is 57,600 bps and for a 28.8 Kbps modem is 115,200 bps. For MNP Class 5 data compression, the maximum effective throughput for a 14.4 Kbps modem is 28,800 bps and for a 28.8 Kbps modem is 57,600 bps. A 33.6 Kbps modem might do a bit better than a 28.8 Kbps modem, but then again, it might not, depending on the quality of your telephone connection. Set your terminal program to these effective values, as opposed to the 33.6 Kbps, 28.8 Kbps, or 14.4 Kbps carrier, for the best possible performance. (Speeds of 57,600 bps and above are not compatible with all PCs and/or high speed modems; if you have difficulties using the higher speeds, try dropping down to 57,600 or 38,400.)
• For information on modem initialization strings, see the CSO's Modem Resource Page

Common Modem and Dialup Problems:

• If you receive the DISCON or NO CARRIER messages, you should check that your equipment is operating and that all the cables and power plugs are solidly connected.
• If you have Call Waiting on your telephone line, it should be disabled before dialup. The command to disable call waiting will be listed in your local telephone directory (frequently what you will have to do is dial "*70" before you dial the telephone number). If you have an autodial modem, you can include this with the telephone number, but you must place a pause between the command and the telephone number. For example: ATDT *70,4133400
• If you seem to be connected but are receiving only garbage on your screen, hangup and try again, using a different parity.