RE: IPDS performance - Twinax vs. TCP/IP

[Steve Morrison <smorrison@xxxxxxxxxxxxx>]

Paul,

Thanks for the reply. We're looking at the possibility of deploying at least
one IPDS printer in the users' work area to make printing more responsive to
their needs. We currently have several IPDS printer in the computer room,
connected with twinax, but a TCP/IP connection in the users' area would be
easier to deploy. We do have PSF installed, so that is not a problem.

Steve Morrison
Beacon Insurance
940-720-4672 

-----Original Message-----
From: Paul Tykodi [mailto:ptykodi@xxxxxxxxx] 
Sent: Tuesday, September 07, 2004 6:58 PM
To: midrange-l@xxxxxxxxxxxx
Subject: Re: IPDS performance - Twinax vs. TCP/IP

Hi Steve,

The throughput of the twinax protocol is 1 MB per
second while Ethernet TCP/IP is 10 Mb per second or
faster. The default packet size used for twinax
transmission of IPDS data is 256 bytes while the
default packet size for TCP/IP transmission of IPDS
data is 1024 bytes (four times more data per packet).

These network transmission characteristics allow the
TCP/IP method for transmitting IPDS data to support
printers with higher PPM (pages per minute) ratings
than twinax. In my experience, the twinax and TCP/IP
methods can drive printers at engine speed up through
about 50 PPM. Anything above this value and the twinax
performance begins to be a significant bottleneck.