FEATURE

HYDRA-II

IBM7171

HYDRA 3000

Factory Default Terminals Defined

Over 70

10

Over 85

User Definable Tables

Over 100 per unit

8K of RAM for
terminal tables

Over 100 per unit

Printer Emulation

1403/3211 and 328x

328x

1403/3211, 328x,
LU Type 1 and 3

Security

Multi-level password Call-Back & Positive disconnect security

Password

Multi-level password Call-Back & Positive disconnect security

Data Bits

7 or 8

7

7 or 8

Flow Control

XON/XOFF, DTR/DSR

XON/XOFF

XON/XOFF, DTR/DSR, RTS/CTS

Screen Updating

Key Ahead + Redundant data suppression

Key Ahead

Key Ahead + Redundant data suppression

Echo off support

Yes

No

No

Double speed cursor movement

Yes

No

No

Configuration

From any supported Ascii terminal, PC, or modem connection

Must be an IBM PC

From any supported Ascii terminal, PC, or modem connection. May also be configured via Telnet/TN3270 using LAN adapter.

Standard Models

Stand Alone and Rack Mount

Stand Alone

Rack Mount (may also sit on desktop surface)

Base unit

4 ports

16 ports

16 ports

Block Channel Support

No

Yes

Yes

SNA Operation

No

No

Yes
without costly FEP or NCP

Non-Sna Operation

Yes

Yes

Yes

BSC / 3780 Support

No

No

Yes

SNA/SDLC Support

No

No

Yes

3172 TCP/IP Compatibility

No

No

Yes

Multi-CPU Operation

No

No

Yes up to 16 simultaneous CPUs

# Sessions per port

1

1

4

Dynamic Session Establish

No

No

Yes

3270 Screen Sizes Supported

Model-2

Model-2
through
Model-5

Model-2
through
Model-5

Extended Attribute Supt

No

No

Yes

LAN-to-3270 Connectivity

No

No

Yes 
(Downstream PU, 
Internal PU, or Telnet/TN3270)

Built-In WAN Capability
(HYDRA-LINK)

No

No

Yes

Automatic Modem Configuration/Initialization 

No

No

Yes

Max # Async Ports Per Chassis

64

64

256

Max # BSC or SNA/SDLC Lines Per Chassis

0

0

256