There were three iterations of the DECserver 90M terminal server:
- Models: DSRVH-M* and -A* were configured without Flash RAM
- Models: DSRVH-N* and -D* were configured with 1 MB of Flash RAM
- Models: DSRVH-P* and -R* were configured with 2 MB of Flash RAM
All supported expanded multi-protocol connections via LAT, Telnet, SLIP, TN3270, CSLIP and PPP. Other features that were also supported: remote-node and remote control applications as well as accounting event logging and audit trails.
DSRVH-M* and -A*
These models (e.g.,DSRVH-MA, DSRVH-AA) were designed without flash and required a down line load over the network. These models cannot be upgraded.
DSRVH-N* and -D*
These models (e.g., DSRVH-NA, DSRVH-DA) were designed with 1 meg flash memory for program load and requires a compressed image that takes 5 minutes to boot. The image, MNENG2,is available for sale/download. This image contains DNAS V3.2. These models cannot be upgraded beyond V3.2
DSRVH-P* and -R*
These models (e.g., DSRVH-PA, DSRVH-RA) were designed with 2 meg flash memory for program load and requires a compressed image that takes less than 1 minute to boot. The image, MNENG3,is available for sale/download. This image contains DNAS V3.2. These models cannot be upgraded beyond V3.2
DCSRV-**
The DECserver 90M's were last built in 2002. Although not a direct replacement, the DECserver 90M+ is being used in place of the older 90M's in many applications around the world.
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