Installing and Administering OSI Transport Services

28 Chapter 1

HP OTS/9000 Resources

The OSI/RFC1006 Stack

RFC1006 allows OSI services, for example X.400, to run over TCP

connections. RFC1006 provides the OSI Transport Protocol (TP) class 0

over TCP. RFC1006 does not, by itself, support OSI services. The upper

layers of the OSI stack provided by OTS are still required.

The graphic below shows the OSI protocol stack with and without

RFC1006. The RFC1006 replaces the OSI transport connections with

TCP connections. All upper layer APIs are identical between RFC1006

and pure OSI protocol stacks.

Figure 1-2

The following is supported in the RFC1006 environment:

• Supported OSI Services: X.400, X.500, FTAM, CMIS

• Supported OTS APIs: XTI, Session API, APRI

• Supported links: Any link that TCP/IP supports

TP0/2/4

OSI Protocol Stack with RFC1006

OSI Services

Presentation

Session

Transport

Network

ACSE/Presentation

Session

TP4

CONS

CLNS

OSI Services

TP0/2/4

OSI Protocol Stack

ACSE/Presentation

Session

RFC1006/TCP