This server contains the complete user documentation for kde except the playground module. Venus at command reference manual august 2000 at command set at commands are issued to the modem to control the modem s operation and software configuration. The format for entering commands is atxn where x is the at command and n is the specific value for that command. Vn format of result code this command selects the format for informationtext and result codes. This command informs the me which character set is used by the te for the phonebooks. This manual also includes commands for business features such as synchronous connectivity. This technical reference for hayes modem users offers additional information about the hayes standard at command set for users who want to use the. The command set includes support for the basic data commands standardized by itu. The hayes command set also known as the at command set is a specific command language originally developed by dennis hayes for the hayes smartmodem 300 baud modem in 1981 the command set consists of a series of short text strings which can be combined to produce commands for operations such as dialing, hanging up, and changing the parameters of the connection. You can add any of the command settings listed in this table to the at command. Hayes command set wikimili, the best wikipedia reader. The following list only contains the original hayes commands. It also includes various controls to set up the modem, including a set of register commands which allowed the user to directly set the various memory locations in the original hayes modem. This manual only describes the generic rockwell at command set.
You can select the release and language of the documentation you are searching for. Simcom offers this information as a service to its customers, to support application and. Dialects only add new commands to the existing at command set, but in general do not change the original commands. This document contains proprietary technical information which is the property of shanghai simcom wireless solutions ltd, copying of this document and giving it to others and the using or. Handling urc unsolicited result code in hayes at command. The at command set is a userfriendly interface that implements cable replacement and.
This technical reference for hayes modem users offers additional information about the hayes standard at. The modem then switches automatically to the defined baud rate and parity, until the next command is issued or the modem is turned off. The sierra wireless gsm products present two methods of controlling the modem. The command set provides a comprehensive description of the modem syntax, command procedures, modem dte commands. Modems have been used since the beginning of computer history. Sregisters can vary a great deal, please consult the at command set specific to your modem when attempting to use these.
Otherxn commands click here please note that this is the basic at command set. At commands can only be entered while the modem is in command mode. The hayes smartmodem command set include the at command set used by many popular modems. Hayes at command set, can be used with activexperts serial. The command set for the modems is compatible with the hayes command set. As said before, as soon as other manufacturers started to implement the hayes at command set in their modems, dialects started to occur. Chapter 5 call control commands multitech systems, inc. Modem at command codes thise are the standard hayes compatible modem at commands. T tone dialing this command sets the modem to tone dial. What at commands can i use with a hayes compatible modem.
Consult the modem documentation for a list of relevant at commands. If any of these strings happen to cause additional issues with your modem, use the atz command to reset the modem back to default factory settings. The gsm modem specific commands are adapted to the services offered by a gsm modem such as. In the following example, the modem is attached to asynchronous interface 2 on the access server. The command set consists of a series of short text strings providing operations such as joining, data exchange and parameters setting. Mp 700 series gps rugged wireless modem at command. Hayes command set comprises several instructions beginning with a twocharacter sequence, at, calledattention characters. To put the modem into online command mode from data mode, you must issue an escape sequence. The modem is controlled and configured by the at attention command.
However, most of these commands remain the same, or similar from modem to modem. Resets s registers and commands to factory default setings from rom config profile, as a powerup would do. A command is not entered until a carriage return is entered. Spbt2632c2a, spbt2632c1a, and in st evaluation tools stevalspbt3atv3, stevalspbt4atv3.
The data used in read mode is selected by the value in x. The hayes at command set is the industry standard method of communicating with and setting up a modem. Hayes standard at command set, in order to maintain the compatibility with existing sw programs. This information comes from the hayes smartmodem 2400 quick reference card, published by hayes microcomputer products, inc. Most modems follow this command set to large extent.
Will cause the dcd signal from modem to pc to track the actual state of the modems carrier. Characters sent from the pc dte are interpreted as commands for the modem. The api documentation is available at api maintained by kde documentation team. Reproduction forbidden without telit communications s. Known as both the hayes command set and the at command set, it has long been the defacto standard for controlling consumer modems and also. The 56k softmodem supports a broad base of commands for data and fax. A complete summary and explanation of the at command set for hayes compatible dialup modems is given on this page. Basic, extended, proprietary and register commands. Information here may no longer be accurate, and links may no longer be available or reliable. The hayes commands started with at to indicate the attention from the modem.
Terminal software soon provided the means to store these modem command codes. A hex string such as 00 49 49 49 49 ff ff ff ff will be sent out through serial port at the baud rate of 115200 immediately after sim900 is powered on. The hayes modem command set here is a description of the hayes command set. Basic command set a capital character followed by a digit. In a context of lora modem, the hayes command set is a variation of the standard at hayes commands. Some commands will vary between manufactures, so if your modem manufacture has their own at command code list you should use that insead. They are called at commands because the characters at must precede each command to get the attention of the modem. The syntax rules followed by telit implementation of either hayes at commands, gsm commands and fax commands are very similar to those of standard basic and extended at commands.
The protocol used by gsm modems for setup and control is based on the hayes at command set. Hayes rocketmodem hardware installation pdf download. The modem is in data mode whenever it is connected to another modem and ready to exchange data. The string following the t or p character is used as an argument to. By making a reverse telnet connection in the exec mode to the port on the access server where the modem is connected, then sending an at command followed by a carriage return. The modem needs these two letters to adjust itself to the settings of the pcs comport. Verizon wireless lte at commands for test automation page 1 of 19. Chapter 5 at commands, s registers, and result codes. The modem is in command mode whenever it is not connected to another modem. At least as it exists now in this hayes 1200 baud modem. This command tells the modem that a command follows it. Jan 30, 2018 hayes developed and published a command set to control the modem over a serial line. The hayes command set is a specific command language originally developed by dennis hayes for the hayes smartmodem 300 baud modem in 1981. Not all languages have all documentation translated.
This document provides initial information related to the verizon wireless long term evolution lte. Table 1 cisco supported hayes modem commands hayes modem commands description at attention command. While the modem is on line, you can temporarily exit the online state, and enter the online command state, from which limit set of at commands can be entered to interrogate the modem current settings and make sure the connection is what is supposed to be and to disconnect the line gracefully. This module explains the at commands n to z as used by a generic hayes compatible modem. External when connecting to a modem, there are a few basic modem settings that are very important or at least preferred. The at command set implemented by sim900 is a combination of gsm07. At commands for smartscm, smartacf, smartacfl, and. However, this list is supposed to be as generic as possible, and should not be extended with modem specific commands. History and description of common codes and registers. For example if someone was dialing into your modem, the modem would echo the message ring ring etc, to your console, until the modem software recognised the ring string and told the modem to answer, with an ata. Smartphones from 11 oems vulnerable to attacks via hidden. To support different configurations of the local hayes modem for each remote connection hayes developed the at command set. First developed by dennis hayes, the at commands can be used to specify settings for hayes compatible legacy modems. Examples of at commands on icubelrwan application note.
Chapter 5 at commands, sregisters, and result codes introduction the at commands are used to control the operation of your modem. The following is a list of hayes compatible at commands and. Not long after, many other modem manufacturers adopted the at command set to be compatible with the terminal software available. At com mands can only be entered while the modem is in command mode. The at command set is a standard developed by hayes to control modems. Venus at command reference manual august 2000 at command set at commands are issued to the modem to control the modems operation and software configuration. Serial programmingmodems and at commandscommands n z. Manual venus at command reference manual august 2000 at command set at commands are issued to the modem to control the modem s operation and software configuration. Serial programmingmodems and at commands wikibooks, open.
Dtstring dpstring dials outbound tone t or pulse p call. Lte at commands for test automation verizon wireless. If you lost your modem manual or never had one in the first place, this reference might come in handy. At command reference manual for the rc288aci and rc288acl modem families order. Developed by hayes microcomputer products and officially known as the hayes standard at. This content has been archived, and is no longer maintained by indiana university. At attention characters at character pairs always at the beginning of each command line, except a, which is to repeat the last executed at command. Data command set general command a repeat the last executed at command do not precede a with at or follow with enter. Proprietary command set these are the commands that are unique and.
At attention commands, or the hayes command set, is a collection of shortstring commands developed in the early 1980s that were designed to be transmitted via phone lines and control modems. The following is a partial list of the hayes command set called the at commands. With serial port component an activexperts product, you can integrate at modem communications in scripts, console applications, gui form applications, web applications and web services. The basic at commands used to control modem operation are. Additional documentation for rockwell and conexant chipset modems is available at, including file formats and source code for the adpcm sound format used by zoom voice modems, and a voice software development kit, as well as manuals for older versions of modem chip sets. This command set became popular among consumer modem manufacturers, and was cloned by many different manufacturers. The modem will not respond to any commands not preceded by an at. Hayes is a registered trademark of hayes microcomputer products, inc. This reference guide provides descriptions of the at commands that are needed. The command set was copied largely verbatim, including the meaning of the registers, by almost all early 300 baud modem manufacturers, of which there were. View and download hayes rocketmodem hardware installation online. Jul 27, 20 the nowfamous at command set first appeared in the 300baud hayes smartmodem, a name coined and trademarked by hayes microcomputer products, inc. This is possible by defining three levels of command sets within the modem, the basic command set, the extended command set and the proprietary command set. At commands for smartscm, smartacf, smartacfl, and sc56d modems.
Quick reference table at attention command defines speed and precedes common line a reexecutes the last command line if modem has not made a connection a modem goes offhook in answer mode b0 sets ccit v. These include the hayes command set as a subset, along with other extended at commands. Y ou should be f amili r with the use of at c mmands th standard wireline modems to use this document. Most dialup modems follow the specifications of the hayes command set which are typically known as at meaning attention commands. Each step in the evolution of hayes modems has added to a feature set that has. The basic command set consists of all the necessary commands to use the modem. At commands can be issued only when the modem is in command mode or online command mode. Since the main objective for this application note is to. Attention command set a series of machine instructions used to activate features on an analog modem. The hayes at command from the attention command which the at command set gets its name. The dial up and wireless modems devices that involve machine to machine communication need at commands to interact with a computer. Set the dte speed of the modem to its maximum capability. Online command mode is a temporary state in which you can issue commands to the modem while connected to another modem.
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