RELEASE NOTES for Digi Sync 570i 1.0, September 17, 1998

This device driver software provides support for up to 16 Sync 570i 
ISA or PCI cards on the Solaris Intel operating system, version 2.5.1 
or greater.  

Features:

Support for the Solaris Synchronous Serial Interface Spec, version 2.3
Support for the Solaris syncinit, syncloop, and syncstat commands 
Support for the Solstice X.25 environment
Support for SNA environments that conform to the Solaris Synchronous 
   Serial Interface Spec, version 2.3
Support for sharing physical memory addresses and IRQs on ISA adapters
Port status utility: dsyncstat 
Adapter configuration utility: dsync_config
On-line Unix Manual pages for dsync_config and dsyncstat and dsync driver

Limitations:

The bit rate is configurable on each port from 150bps to 5Mbps,
however actual throughputs will not always equal the line bit rate.

High throughput performance is fairly sensitive to the size of the
MRU (Maximum Receive Unit).  At line speeds greater than 1000000 bps,
MRUs between 1024 and 2060 are recommended.  The maximum MRU 
available is 2060. 

When using external clocking on line speeds below 1200bps, it may
be beneficial for user applications or protocol modules to 
use the syncinit utility or S_IOCSETMODE ioctl to set the 
estimated bit rate on the port.  (e.g. syncinit dsync0 600)
This is to ensure an appropriate transmission timeout interval for
large packets.

Use with other products:

The Digi Sync 570i driver conforms to the API definition in the Sun 
Synchronous Drivers Interface Specification, version 2.3.  Many 
applications and protocol packages have been written to conform to the 
API in this specification, and Sun Microsystems uses this specification 
for builtin serial synchronous ports on their servers.  See the Solaris 
manual pages on zsh and se_hdlc for more information on other drivers 
that conform to this specification.

Protocol packages will need to use the /dev/dsync devices to use 
the Digi Sync 570i adapter, and will need to be configured accordingly.   
For instance, in order to add the Digi Sync 570i driver to the device 
pick list in Sunsoft Solstice for Server Connect X.25 package, one would 
do the following, prior to configuring X.25 with the x25tool program.  

Make a backup copy of the file /etc/opt/SUNWconn/x25/boardconf.  
Edit the /etc/opt/SUNWconn/x25/boardconf and add these lines:

WAN_DEVICE
        device  /dev/dsync
        symbolic        DIGI
        lines   4
        mru     2060
        comment Digi Sync 570i Adapter

The mru of 2060 is large enough to allow for 2048-byte X.25 packets.
For other configuration issues with Solstice X.25 or other protocol
packages, see the documentation supplied with those packages.


Copyright 1998 Digi International (PN 93000313A)