I use 23 for "standard telnet" and port 623 for my RLOGINs (OTELNET)
Here are the entries in /etc/services:

telnet          23/tcp 
otelnet         623/tcp 

On Thu, 2 Nov 2006 14:55:13 -0600, Mark Zelden <[EMAIL PROTECTED]> 
wrote:

>On Thu, 2 Nov 2006 21:43:51 +0100, Lindy Mayfield
><[EMAIL PROTECTED]> wrote:
>
>>Correct me, please, if I am wrong, but if you telnet to port 25 you get to
>TSO, but if you rlogin to port 513 you get to USS.  No?
>>
>
>23 is TSO (usually) and whatever you want for z/OS Unix.  I have used
>623 most of the time but that has varried at different shops I have
>been at.    I've also been at a shop that set up 23 for Unix and
>something else for TSO.    And then there is sercure telnet... but
>I digress....
>
>So if I wanted to use win-doze my telnet client to IP into z/OS Unix,
>I do this from a command prompt:
>
>telnet host_name 623
>
>Mark
>--
>Mark Zelden
>Sr. Software and Systems Architect - z/OS Team Lead
>Zurich North America / Farmers Insurance Group - GITO
>mailto:[EMAIL PROTECTED]
>z/OS and OS390 expert at http://searchDataCenter.com/ateExperts/
>Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html
>
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