Morning Star Advantage The Morning Star X.25 communications gateway allows most UNIX* systems to communicate with other devices that are attached either directly or through public and private packet switched networks. The X.25 gateway software runs on all of the existing Morning Star hardware platforms and will operate on all future platform designs. Interface Flexibility Morning Star supports numerous interfaces to the X.25 gateway product. The IP driver interface turns your system into a powerful internetwork gateway. Local IP traffic is routed to any destination on the X.25 networks that are connected to the Morning Star gateway. This allows users to share system resources among multiple, remote locations using their computers TCP/IP facilities. The socket interface is source code compatible with the SunLink* packet level interface. Any applications developed to run over SunLink X.25 can simply be recompiled with the Morning Star supplied libraries, giving the customer a transparent migration path to a wide range of UNIX platforms. Remote PAD users can establish transparent login sessions on the local machine using the X.29 interface. The X.3/X.28 PAD interface supports outgoing calls via cu, tip and UUCP. The wide variety of interfaces provided by the Morning Star X.25 communications gateway make it one of the most flexible products on the market today. Packet Switching The X.25 communications gateway serves as a packet switch for multiple devices or for networks connected to it. The Morning Star gateway can be used to insulate a Public Data Network from a non-compliant or non-certified X.25 device. Hardware Flexibility The X.25 gateway software runs on a wide range of hardware platforms giving it the flexibility to work on most UNIX computer systems manufactured today. Because of the range of our hardware products, the customer can select the platform that suits their performance needs and budget. Morning Star offers a wide variety of the most frequently used serial interface types. CCITT Compliant Morning Star X.25 software is 1980, 1984 and 1988 CCITT compliant. The software is DDN and TYMNET certified with new certifications being added as they are requested. Supported X.2 Facilities X.2 Features 1.1 Extended packet sequence numbering 1.2 Non-standard default window sizes 1.3 Non-standard default packet sizes 1.4 Default throughput classes assignment 1.5 Flow control parameter negotiation 1.6 Throughput class negotiation 1.7 Packet retransmission 1.8 Incoming calls barred 1.9 Outgoing calls barred 1.10 One-way logical channel outgoing 1.11 One-way logical channel incoming 1.12 Closed user group 1.13 Closed user group with outgoing access 1.14 Closed user group with incoming access 1.19 Reverse charging acceptance 1.20 Fast select acceptance 1.22 Charging information 1.25 On-line facility registration 1.26 D-bit modification 1.27 Local charging prevention 1.29 Network user identification 1.31 RPOA selection per interface X.2 Call Facilities 2.1 Closed user group selection 2.2 Bilateral closed user group selection 2.3 Reverse Charging 2.4 RPOA selection per call 2.5 Flow control parameter negotiation 2.6 Fast select 2.9 Charging information 2.10 Transit delay selection and indication 2.11 Call redirection notification 2.12 Called line address modification notification 2.14 Closed usergroup with outgoing access selection Morning Star Supplementary Options S.1 Logical channel range negotiable S.2 D-bit allowed S.3 Perform closed user group functions S.4 DTE send registration request at startup S.5 Check facilities field S.6 Allow undefined facilities S.7 Generate diagnostic packet S.8 Check Q-bits in complete packet sequence S.9 Allow non-zero cause from DTE S.10 Allow OSI facilities (1984) S.11 1988 call deflection S.12 1988 A-bit S.13 Allow malformed clearing packets S.14 Fix invalid facilities S.15 Fix undefined facilities S.16 Fix call/clear user data S.17 Fix call/clear addresses S.18 Allow OSI facilities (1988) S.19 Fixes apply to outgoing packets S.20 Fixes apply to incoming packets S.32 Charging info money present S.34 Charging info segments present S.35 Charging info duration present S.36 Bit-encoded facilities present Morning Star X.25 Features Conforms to CCITT 1980, 1984, and 1988 recommendations Supports line speeds up to U.S. and European TI (hardware dependent) Supports LAP and LAPB at frame level Supports incoming only, outgoing only, switched and permanent virtual circuits Supports packet sizes up to 4096 bytes Supports packet switching between physical lines Supports automatic routing of outbound calls to the appropriate line Supports inbound and outbound UUCP Allows remote login, via X.29, from remote X.3/X.28 PADs Approximately 120 virtual circuits are supported (communications controller only - daemon version is system dependent) Automatically sets remote PAD parameters Includes an X.25 trace facility to provide the ability to diagnose X.25 communication problems Most parameters are reconfigurable without restarting * UNIX is a trademark of AT&T. SunLink is a trademark of Sun Microsystems.