X25AM Programming Manual

Introduction

X25AM Programming Manual—527201-001

1-20

SNAX-Over-X25AM

The SNAX/XF-Over-X25AM environment uses the Qualified Logical-Link Control

(QLLC) protocol to connect SNA devices to an X.25 packet switched network. QLLC is

an IBM proprietary link level protocol that is substituted for SDLC whenever IBM

interfaces with X.25.

For more information about SNAX/XF configuration, refer to the SNAX/XF and

SNAX/APN Configuration and Management Manual. For more information about IBM’s

proprietary QLLC protocol, refer to The X.25 Interface for Attaching SNA Nodes to

Packet-Switched Data Networks: General Information Manual.

The Modem Interface

Table 1-2. Controller Types and Supported Modem Interfaces

Supported Modem

Interfaces:

Controller Type Number RS-232C RS-422/449 X.21 V.35

Dedicated Bit Sync 6203 Yes Yes

6204 Yes Yes

3604 Yes Yes

3650/6100 Family

Controllers

3650 CSS or

6100 CSS

Yes Yes Yes* Yes

6105 Yes Yes Yes* Yes

3605 Yes Yes Yes* Yes

CLX Multifunction

Controller

3681 Yes No

SWAN Concentrator 3880 Yes Yes Yes Yes

SWAN II Concentrator 3881 Yes Yes Yes Yes

*X.21 support for leased line configurations only.