🚀 go-pugleaf

I am attempting to use the shareware terminal program Zterm 
(v 0.75).  While I have successfully tweaked the abundant options 
allowing me to communicate on line consistently, I have not been 
so lucky with Zmodem transfers.

I am sending this message via Portal, a public access, Unix based 
Usenet gateway.  Portal offers Zmodem file transfers.  However, 
this works only part of the time.  (I am using a Mac + with 2.5 Mb 
of RAM running System 6.02 with Multifinder active.  I connect 
with Portal via PCI/Tymnet.)  Sometimes, when attempting an upload 
to Portal the upload aborts with the message 'dte originated' from 
Portal.  At other times, the upload seems successful, except that 
at its conclusion, the screen clears, the modem 'receive data' 
light blinks like crazy and the cursor (I-beam) flashes like 
crazy.  The only way out of this (the modem will not respond to 
the normal Hayes 'hang up' command) is to 'quit' Zterm and start 
it up again.  After the start up, everything is as it should be, 
with the first page of the upload on the screen with the normal 
Portal prompt.  I can then type in 'ok' and proceed as normal.

Downloads are also erratic.  Sometimes they lock up the machine to 
the point where only a cold boot will free up the serial port.

Is anyone else out there using ZTerm?  with packet switching?  Any 
clues as to what I am doing wrong?  How should I have 'flow 
control' and the 'Zterm parms' set?

Any help would be greatly appreciated as the throughput of a 
Zmodem transfer is about three times as great as that of Xmodem.

Thanks.

+-------------------------------+--------------------------------+
|   Mike G Newman               |  mike_g_newman@cup.portal.com  |
|   BX 1510                     |  MCI:   mnewman (333-1196)     |
|   Saipan MP 96950             |  Phone: 670-234-7726           |
+-------------------------------+--------------------------------+

PS To Portal users:  I attempted to simply upload this article
to the 'Phoenix' Mac sig, but kept getting messages that adding
an article or collection was 'not allowed'.  Wonder why...?
mgn