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Topic: X25

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  X25(4) Linux Manual Page
X25 sockets provide an interface to the X.25 packet layer protocol.
X25 sockets can also be used for communication without an intermediate X.25 network (X.25 DTE-DTE mode) as described in ISO-8208.
X.25 N-Reset events are not propagated to the user process yet.
jamesthornton.com /linux/man/x25.7.html   (456 words)

 X.25 - LAPB | MLP | HDLC | Terminology
X.25 is the CCITT’s recommendation for the interface between a DTE and DCE over a Public Data Network.
Generally, X.25 covers layers 1 to 3 of the ISO communication model, but the term is used here to refer specifically to packet layer 3.
X.25 has a field (of variable length) for facilities, while X.75 has a field (of variable length) for network utilities followed by facilities.
www.protocols.com /pbook/x25.htm   (3377 words)

 X.25 and LAPB Commands   (Site not responding. Last check: 2007-09-10)
The default is 10 frames for LAPB encapsulation; X25 encapsulation may not set this parameter because proper operation requires that LAPB send all requested frames.
Use the x25 facility interface configuration command to force facilities on a per-call basis for calls originated by the router; switched calls are not affected.
Use the x25 ip-precedence interface configuration command to enable the ability to open a new virtual circuit based on the IP precedence value.
www.prz.tu-berlin.de /docs/misc/ciscodoc/data/doc/software/10_0/rpcs/sx25.htm   (3658 words)

 Annex G (X.25 over Frame Relay)
The use of X.25 as a network backbone is becoming obsolete as modern networks change their backbones to newer technologies such as Frame Relay, ATM, and IP.
X.25 Layers 2 and 3 are transparently supported over Annex G. LAPB treats the Frame Relay network like an X.25 network link and passes all of the data and control messages over the Frame Relay network.
Consist of bundled X.25 and LAPB commands, meaning that you do not have to enter the same X.25 or LAPB commands for each DLCI you are configuring.
www.cisco.com /univercd/cc/td/doc/product/software/ios120/120newft/120t/120t3/x25anxg.htm   (4605 words)

 X.25 Packet Switching - X.25 Card - Linux Telephony - HDLC - Frame Relay - ATM   (Site not responding. Last check: 2007-09-10)
X.25 permits a DTE user on an X.25 network to communicate with a number of remote DTE's simultaneously.
X.25 relies on the underlying robustness of HDLC LAPB to get data from node to node through the X.25 network.
One of the largest uses of X.25 is the transfer of asynchronous data streams such as those produced by simple terminals like credit card readers.
www.sangoma.com /x25.htm   (1136 words)

 X.25 and LAPB Commands
Creates an entry in the X.25 routing table (to be consulted for forwarding incoming calls and for placing outgoing PAD or protocol translation calls).
X.25 overhead is 3 bytes for modulo 8 and 4 bytes for modulo 128.
The X.25 software accepts default packet sizes and calls that specify maximum packet sizes greater than those the LAPB layer supports, but negotiates the calls placed on the interface to the largest value that can be supported.
www.cisco.com /univercd/cc/td/doc/product/software/ios120/12cgcr/wan_r/wrx25.htm   (3899 words)

X25 redirection enables an X25 application to redirect a communication to a target X25 server by issuing to X25 network a redirection request.
Redirection is transparent to the X25 subscriber (usually the caller) who is not informed that a redirection took place nor can control redirection in any way.
X25 switches that are configured to force incoming calls to STARX25 should also be considered as part of this logical access control system.
www.actane.com /STARX25.htm   (1521 words)

 X25 information - Martin Baker
To minimize these problems X.25 in defined in 3 layers, each layer is, as far as possible, independent of the others.
The lowest layer of X.25 is the physical layer, it defines the physical interface between the Public Network customers equipment and the first point on the network (the modem).
The physical layer of X.25 is a subset of V.24/RS232.
martinb.com /coms/protocol/x25   (392 words)

 Reference for Enterprise OS Software
The X.25 standard specifies a range from 1 through 4095 LCNs to be distributed for permanent incoming, outgoing, or two-way (both incoming and outgoing) traffic.
The STATUS parameter provides information about the status of the X.25 line, including the virtual circuit number, the virtual circuit state, the packet size, the window size used by the virtual circuit, the user and DTE profile IDs, compression type, and the DTE address to or from which the virtual circuit was originated.
The X.25 standard specifies a range of from 1 through 4,095 logical channel numbers (LCNs) to be used for permanent incoming, outgoing, or two-way (both incoming and outgoing) traffic.
support.3com.com /infodeli/tools/bridrout/u_guides/html/eos1111/family/ref/x25.htm   (775 words)

 X.25 Protocol   (Site not responding. Last check: 2007-09-10)
X.25 is a packet switched data network protocol which defines an international recommendation for the exchange of data as well as control information between a user device (host), called Data Terminal Equipment (DTE) and a network node, called Data Circuit Terminating Equipment (DCE).
X.25 was originally approved in 1976 and subsequently revised in 1977, 1980, 1984, 1988 and 1992.
X.25 specifies that in this case, the outgoing call is put through and the incoming one is cancelled.
www2.rad.com /networks/1996/x25/x25.htm   (2341 words)

 X.25 and X.121 address, packet switched network, Link Access Protocol Balanced
X.25 is used in a Packet Switched Network and in 1964 was designed by Paul Baran of the RAND Corporation for use with the Public Data Network (PDN) and unreliable analog telephone services.
Because a router acts as an X.25 host, it must be configured as a DTE and the X.25 switch is the DCE.
The X.25 provider will give you a range of VCs (out of the total range which is 1-4095) that you can use and these must be configured the same on the local switch as on the router.
www.rhyshaden.com /x25.htm   (1212 words)

 Using Permanent Virtual Circuits   (Site not responding. Last check: 2007-09-10)
A PVC is connected as long as X.25 Level 3 is active.
However, until a socket is bound to the PVC, X.25 discards all packets received over the PVC and a RESET REQUEST packet is sent.
X.25 sends a RESET REQUEST packet on the PVC if the socket is closed for any reason, for example, the local process dies.
docs.hp.com /en/36960-90058/ch06s04.html   (541 words)

 UNIX Manual Page: man 7 x25   (Site not responding. Last check: 2007-09-10)
This allows applications to communicate over a public X.25 data network as standardised by International Telecommunication Union's recommenda- tion X.25 (X.25 DTE-DCE mode).
SOCKET OPTIONS The following X.25 specific socket options can be set by using setsock- opt(2) and read with getsockopt(2) with the level parameter set to SOL_X25.
SEE ALSO socket(7), socket(2) Jonathan Simon Naylor: "The Re-Analysis and Re-Implementation of X.25." The URL is ftp://ftp.pspt.fi/pub/ham/linux/ax25/x25doc.tgz VERSIONS The PF_X25 protocol family is a new feature of Linux 2.2.
www.cl.cam.ac.uk /cgi-bin/manpage?7+x25   (512 words)

 Gandacar Consulting Limited   (Site not responding. Last check: 2007-09-10)
X.25 is a standard communication protocol and a wise choice for the communication of data with public and private networks.
X.25 is strong and portable and it's these features which makes X.25 such a well-liked protocol to data communications world wide.
Gandacar is committed to supporting the X.25 protocol for years to come.
www.gandacar.ca /X25_products.html   (499 words)

 x25   (Site not responding. Last check: 2007-09-10)
X25 sockets can also be used for commu- nication without an intermediate X.25 network (X.25 DTE-DTE mode) as described in ISO-8208.
However, re- assembling of a long message might fail if there is a temporary lack of system resources or when other constraints (such as socket memory or buffer size limits) become effective.
If the first byte of the data written to the socket is 1 the Q-bit of MENTAL might also imply that future versions of the interface are not binary compatible.
techpubs.sgi.com /library/dynaweb_docs/linux/usr/share/catman/man7/x25.7.html   (440 words)

 Closed User Group Selection Facility Suppress Option
Many legacy X.25 DTE devices cannot process the CUG selection facility in incoming call packets, so the devices reject the calls with the CUG selection facility.
If Annex G (X.25 over Frame Relay) is being used, this feature must be configured on the X.25 profile.
This command assumes that an X.25 network connection is being implemented and observes rules defined by X.25 and X.301 for CUG access.
www.ciscosystems.net.pk /univercd/cc/td/doc/product/software/ios121/121newft/121t/121t5/dtcugsfs.htm   (1623 words)

 PCMCIA X.25 card, FarSync M-Series by FarSite
The X.25 software has a host of features including ISO Transport (classes 0 to 3), IP over X.25, support for OpenFT FTAM, a WinSock2 compliant Sockets API, a Java API, a COM Port API, a low level NCB API and a LAP-B layer 2 (HDLC) that is also directly accessible by its own API.
The Sockets support for the FarSync X.25 cards retains this ease of use and also allows the special features of X.25 and ISO Transport classes 0 to 3 to be accessed.
The X.25 software, utilities, IP over X.25 support and the development tool kit are all included on the CD-ROM supplied with the FarSync communications adapter.
www.farsite.co.uk /x.25_card_products/FarSync_X25_PCMCIA_card_Windows.htm   (1481 words)

 Welcome to CollegeNET
X25 is a web-based space analysis tool that allows colleges and universities to more accurately determine how well requirements for space are being met.
Prior to X25, colleges and universities had to rely primarily on educated “guesses” about space utilization and class fit, even when making high-ticket renovation and building decisions.
X25 changes this by providing clear, empirical data that schools can examine before committing to costly construction projects.
corp.collegenet.com /news/X25_Release   (288 words)

 Penetration Testing: Re: [PEN-TEST] X25, all but forgotten?
X25 is a gold mine as far as penetration is concerned.
As for a X25 scanner, I had written one 10 years ago in C that would scan
DATAPAC (Canadian X25 network that was/(still is?) run by Nortel).
seclists.org /pen-test/2000/Aug/0191.html   (352 words)

 Zvon - RFC 1183 [New DNS RR Definitions] - X.25 and ISDN addresses, Route Binding
This section describes an experimental representation of X.25 and ISDN addresses in the DNS, as well as a route binding method, analogous to the MX for mail routing, for very large scale networks.
The X25 RR The X25 RR is defined with mnemonic X25 and type code 19 (decimal).
A host connected to the ISDN may be able to use both the X25 and ISDN addresses, with the local prefix added.
www.zvon.org /tmRFC/RFC1183/Output/chapter3.html   (977 words)

 PCI-X / PCI X.25 card, FarSync T-Series by FarSite
The FarSync X25 T-Series PCI adapters are suitable for connection to all types of X.25 network, including access via the ISDN D channel, Dialup X.25 and leased lines.
The X.25 software, Utilities, IP over X.25 support and the Developers Toolkit are all included on the CD-ROM supplied with the FarSync communications adapter.
An optional X.25 connection expansion pack is available, this must be ordered at the same time as the X.25 card.
www.farsite.co.uk /x.25_card_products/FarSync_X25_PCI_T2P_Card.htm   (2621 words)

 X25 PCMCIA Cards for Windows XP, 2000 and NT - Simtek Solutions
The FarSync X25 M-Series PCMCIA cards are suitable for connection to all types of X.25 networks, X.25 over the ISDN D channel and leased lines.
The API is particularly suitable where a large number of sessions are required or where close control over the X.25 layer is required.
The IP over X.25 support is included as part of the FarSync X25 product, it is fully integrated into Windows XP and 2000.
www.simtek-solutions.com /net/x_25_PCMCIA_win2k.htm   (663 words)

 ISS X-Force Database: x25(154): X25 daemon running
X25 allows an attacker to possibly gain access using an X.25 network rather than through TCP/IP.
Remove or disable the X25 daemon if it is not needed.
To disable X25, put # at the beginning of the snmp line in your etc/inetd.conf file (usually located in /etc) and then restart inetd.
xforce.iss.net /xforce/xfdb/154   (307 words)

 1.5.4 La norme X25, niveau rĂ©seau.
Comme illustré dans la figure 1.18 le protocole X25 contient les trois premières couches du modèle OSI et définit l'interface entre un ETTD (Équipement Terminal de Traitement de Données) et un ETCD (Équipement de Terminaison de Circuit de Données) pour la transmission de paquets.
X25 définit les types de paquets et leur format est le suivant (chaque ligne correspond à un octet
X25 utilise le mode avec connexion, sachant que la connexion est réalisée à l'aide d'un circuit virtuel dont le fonctionnement se déroule comme illustré dans la figure 1.19.
www.info.univ-angers.fr /pub/pn/poly/node19.html   (351 words)

 Go-Ped X25 Motor Scooter | Mercantila
If you are not perfectly satisfied with your new X25, return it within 30 days of delivery for a full refund of the purchase price.
Beginning in 1985 with a prototype for a new motorized personal transport device Steve Patmont launched Patmont Motor Werks, creators of the Go-Ped, the original motorized scooter, in his garage.
Knowing the market opportunities were endless for his fun, carefree design, Steve secured a patent and began shopping his invention around to purveyors of yachts and personal aircraft as a light, portable alternative transportation device to extend owners transportation choices on land.
www.mercantila.com /catalog/store/Go-Ped_X25_Motor_Scooter   (232 words)

 Throughput of X25 links - Martin Baker
The time for the receiver to accept, process and acknowledge a data packet is negligible.
The data signalling rate, D, is the same at both X.25 interfaces.
The maximum attainable throughput indicates the overhead octets introduced at x25 levels 2 and 3.
www.euclideanspace.com /coms/protocol/x25/throughp   (423 words)

 IT Resource Center forums - enabling X25 interface card on HP9000   (Site not responding. Last check: 2007-09-10)
Lastyear february I tested X25 communcation on a D390 with HP-UX 11.00, after the test I downgraded the D390 from HP-UX 11.00 to 10.20.
I did not use the X25 on the D390 because there was another HP machine on which the X25 was installed and working.
So I connected the X25 cable from the HP to the modem and configured the X25 interface card and enabled it, but I received from SAM the message and#91;x25initand#93; Device /dev/x25idmap is not configured in kernel.
forums1.itrc.hp.com /service/forums/questionanswer.do?threadId=51892   (175 words)

 Linux: x25   (Site not responding. Last check: 2007-09-10)
The following X.25 specific socket options can be set by using setsock- opt(2) and read with getsockopt(2) with the level parameter set to SOL_X25.
For data read from the socket, a 0 first byte indi- MENTAL might also imply that future versions of the interface are not binary compatible.
socket(7), socket(2) Jonathan Simon Naylor: "The Re-Analysis and Re-Implementation of X.25." The URL is ftp://ftp.pspt.fi/pub/ham/linux/ax25/x25doc.tgz
www.linuxforum.com /man/x25.7.php   (438 words)

 Compatible Canon X25 Toner ImageClass MF5530-ImageClass MF5550
X25 Toner cartridge in our state of the art remanufacturing facility.
Most cartridges can be remanufactured 2-3 times before they have to be replaced.
Your X25 can be remanufactured 2-3 times before it has to be discarded.
www.saveonink.com /x25.htm   (419 words)

 PMDF System Manager's Guide
CONS is likely to be of use only if you are implementing an X.400 connection over an X.25 datalink.
In addition, you must have installed, configured, and tested the X.25 components of DECnet/OSI as well as any X.25 routers, modems, or other equipment.
For inbound calls, X.25 must be directed to pass OSI calls up to the OSI transport.
www.cuis.edu /pmdf_root/doc/html/sysman/book_rd1.html   (1091 words)

 x25 ammo
There are several differences between the two and I will leave it to the died-in-the-wool techies to cover exactly what they are.
By raw muzzle velocity, Shackleford shows one batch of Sellier and Beillot x25 to be the hottest peppers in the garden at 1545 fps.
Second in sheer speed is a batch of Bulgarian surplus x25 (possibly 1950s) at 1543 fps.
www.geocities.com /Yosemite/Gorge/4653/x25ammo.htm   (1128 words)

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