Computer Support Group and Services
LAMONT-DOHERTY EARTH OBSERVATORY
THE EARTH INSTITUTE AT COLUMBIA UNIVERSITY

Computer Support Group and Services
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LDEO Dialup Network

System Details

A new ISDN-PRI (full digital) modem pool has been installed. It consists of 23 digital modems connected to the LDEO phone switch via a ISDN-PRI T1 line. The LDEO switch is in turn connected to the central office via ISDN-PRI links over fiber optic cable.

This means these modems have the most up-to-date state-of-the-art connection to the telephone network possible and will be able to accept ISDN-BRI (in home ISDN connections 2 X 64K) or 56K analog modem connections. At the moment, the software is configured for the Kflex 56K standard and we are waiting for an upgrade to the new V90 standard. This means your new V90 modem or Sportster X2 modem will currently only connect at V34 (28,800). Please be aware that when we upgrade to V90 the ability to actually make a connection at the faster speeds depends on several external factors which include the quality for you "local loop" copper, the distance from the central office and the number of A-to-D conversions between your end and the Orangetown central office.

Anyone with an existing PPP or ARA account may use the new modem pool and anyone wishing an account just needs to send e-mail to request. As always you may dial into the modem pool with a 'dumb' terminal connection and telnet to a host of your choice with just your regular network account and password.

Set Up

IP address dynamic (set by server)
Netmask set by server (255.255.255.0)
Gateway set by server (129.236.2.100 netblazer)
Nameserver set by server (129.236.10.20 chaos)
Pop server pop.ldeo.columbia.edu
Imap server imap.ldeo.columbia.edu
SMTP server smtp.ldeo.columbia.edu
macmail.ldeo.columbia.edu
You may change your password by typing old_pw/new_pw at the password prompt.

Dial into the MicaBlazer digital modem pool at 365-8135.

Currently this modem pool has 23 modems which will accept calls from 300 through V90. V34, V32, V32bis, V42 (LAP-M or MNP) error correction and V42bis compression are also supported.



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