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2000 Nokia Mobile Phones. All Rights Reserved.

27

AT+ICF DTE-DCE Character Framing

This command is used to determine the character framing that the 
data adapter uses while accepting commands and while transmit-
ting 
information text and a result code to/from a DTE.

Note: 

The terminal does not support autobauding. Therefore, after 

changing character framing settings of the data adapter and your 
communications application, close and restart the communications 
application. For repeated use of these settings you should issue the 
AT-commands AT

&

W and AT

&

Y.

Syntax:

AT+ICF=[<format>[,<parity>]] Set character framing.

AT+ICF? Query 

current 

setting.

Response is +ICF:<format>,<parity>.

AT+ICF=? 

Show valid range of parameters.

Response is +ICF:(1-6), (0,1,4).

Parameters:

<format>

3 

8 data, no parity, 1 stop

4 

7 data, no parity, 2 stop

5 

7 data, parity, 1 stop

6

7 data, no parity, 1 stop

<parity>

0 odd

1 even

4

none

Summary of Contents for PremiCell

Page 1: ...hts reserved Nokia Mobile Phones operates a policy of continuous improvement Therefore we reserve the right to make changes and improvements to any of the products described in this guide without prior notice Nokia Mobile Phones is not responsible for any loss of data income or any consequential damage howsoever caused 9351671 Issue 4 ...

Page 2: ...ration Page 12 8 A Re execute Command Line Page 30 9 Escape Sequence On Line Command Mode 9 2 Descriptions of AT Commands 10 2 1 Call Control 10 ATA Answer Command 10 ATD Dial Command 10 Examples 11 ATH Hang Up Call 12 ATL Monitor Speaker Volume 12 ATM Monitor Speaker Mode 12 ATO Go On Line 12 ATP Set Pulse Dial as Default 13 ATT Set Tone Dial as Default 13 AT CHUP Hang Up Call 13 AT CRC Cellular ...

Page 3: ...ty Status 18 AT CPBF Find Phone Book Entries 19 AT CPBR Read Phone Book Entry 20 AT CPBS Select Phone Book Memory Storage 21 AT CPBW Write Phone Book Entry 21 AT CSCS Select TE Character Set 23 AT CSQ Signal Quality 24 2 4 Computer Data Adapter Interface Commands 24 ATE Command Echo 24 ATQ Result Code Suppression 24 ATV Define Response Format 25 ATX Response Range Selection 25 AT C Define DCD Usag...

Page 4: ...l 39 2 8 SMS Commands Used in Text and PDU Modes 39 AT CSMS Select Message Service 39 AT CPMS Preferred Message Storage 40 AT CMGF Message Format 41 AT CSCA Service Centre Address 41 AT CSMP Set Text Mode Parameters 42 AT CSDH Show Text Mode Parameters 42 AT CSCB Select Cell Broadcast Message Types 43 AT CSAS Save Settings 44 AT CRES Restore Settings 44 AT CNMI New Message Indications to DTE 45 AT...

Page 5: ... 4 2 CMS ERROR Message Service Failure Result Code 60 4 3 CRING Extended Format Incoming Call Indication 61 4 4 RING Incoming Call Indication 62 4 5 CMTI Received Message Indication 62 4 6 CMT Received Message Routing 62 4 7 CDS Received Status Report Routing 63 4 8 CMT Received Message Routing 64 4 9 CDS Received Status Report Routing 64 5 Abbreviations 66 ...

Page 6: ... AT commands are not sup ported by all Nokia products Giving a command which is not supported causes an error response and if the extended error report feature has been enabled with the AT CMEE command the error response also reports that the command is not supported with the product used Also some pa rameters may not be supported by all products and in this case those parameters are just ignored ...

Page 7: ...r via your communications applica tion When the data adapter receives a command it responds with a message that is displayed on your computer screen 1 4 Most common AT commands This section introduces the most commonly used AT commands with a brief description You can find more detailed information on the command on the page indicated in the description AT Command Help Page 30 Displays a list of a...

Page 8: ... been established and the escape sequence has been issued ATS Select an S Register Page 11 ATSr Displays the value of S register r ATSr n Sets the value of S register r ATV Define Response Format Page 20 Determines whether result codes are transmitted in numeric or alphanumeric form ATV 0 Numeric responses short form ATV1 Textual responses long form AT F Restore Factory Settings Page 12 Restores a...

Page 9: ...nd preceding this request If this was the first request then an OK status will be returned Escape Sequence On Line Command Mode Returns the data adapter to command mode after a connection has been established without breaking the connection The data adapt er must be in command mode to accept AT Commands ...

Page 10: ...ish a connection further attempts will be delayed i e successive attempts to dial the same number will be rejected for a short period of time and the response DE LAYED will be displayed The delay period only lasts for a few sec onds initially however if you continue to try to get the call through and fail the delay will be prolonged for a few minutes Finally the called number will be included on a...

Page 11: ...racter Effect Automatically adds the international dialling code before the number Place this modifier before the dialling string A pause in dialling The duration of the pause is specified by the S register number 8 In the voice call mode numbers after the modifier are sent as DTMF tones T P W These dial modifiers have no effect They have been included for compatibility reasons Examples ATD 358312...

Page 12: ... command in stead Syntax ATH n Hang up call ATL Monitor Speaker Volume This command has no effect on the data adapter It is included for compatibility rea sons Syntax ATL n ATM Monitor Speaker Mode This command has no effect on the data adapter It is included for compatibility rea sons Syntax ATM n ATO Go On Line This command is used when you have made a connection with the remote device and have ...

Page 13: ...ng mode call is ac tive Syntax AT CHUP Hang up call Response is NO CARRIER AT CRC Cellular Result Codes This command controls whether or not the extended format incom ing call indication is used When enabled an incoming call is indi cated to the DTE with the result resulting code CRING type insteadofthenormalRING Syntax AT CRC mode Set incoming call indication mode AT CRC Query current setting Res...

Page 14: ...s Response is CSTA list of sup ported type s Values for type 129 normal 145 international access code character is automatically added 2 2 Data adapter Control Commands ATI Identification This command displays information about the data adapt er Syntax ATI0 Displays the ID number stored in S register S39 in decimal format ATI1 Displays the serial number of the terminal ATI2 ATI3 Displays the revis...

Page 15: ...d Syntax ATS register_number Displays the value of the S reg ister ATS register_number value Assigns value to the S regis ter ATZ Recall Stored Profile This command restores the parameter values of one of the user sets by recalling the respective S Register settings from the memory Syntax ATZ 0 Recall stored profile 0 ATZ1 Recall stored profile 1 AT F Restore Factory Settings The command restores ...

Page 16: ... 0 AT Y1 Load parameters from set 1 AT GCAP Request Complete Capabilities List This command causes the data adapter to display information in tended to permit the user to identify the overall capabilities of the data adapter Syntax AT GCAP Display data adapter capabilities Response is GCAP CGSM which means that cellular commands are supported AT GMI Request Manufacturer Identification This command...

Page 17: ...est Manufacturer Identification This command displays phone manufacturer identifica tion Syntax AT CGMI Display manufacturer identification AT CGMM Request Model Identification This command displays the terminal model identification Syntax AT CGMM Display model identification AT CGMR Request Revision Identification This command displays the terminal revision identifica tion Syntax AT CGMR Display ...

Page 18: ...Enable or disable terminal error result code AT CMEE Query current setting Response is CMEE mode AT CMEE Show supported modes Response is CMEE list of supported mode s Values for mode 0 disable the result code and use ERROR instead 1 enable the result code and use numeric values 2 enable the result code and use verbose values AT CPAS Terminal Activity Status This command returns the activity statu...

Page 19: ...ext Entries are searched from the current phone book memory storage selected with the AT CPBS command The format used for string information is se lected with the AT CSCS com mand Syntax AT CPBF findtext Find entry Response is CPBF in dex number type text and it is repeated several times if more than one entry matches the search AT CPBF Show maximum field lengths Response is CPBF nlength tlength P...

Page 20: ...formation is selected with the AT CSCS com mand Syntax AT CPBR index1 index2 Read phone book entry Response is CPBR index number type text and it is repeated several times if more than one entry is read AT CPBR Show list of supported indexes and maximum field lengths Re sponse is CPBR list of supported in dex s nlength tlength Parameters index phone book memory location number number phone number ...

Page 21: ... storage Select phone book memory storage AT CPBS Query current setting Response is CPBS storage AT CPBS Show supported memory storages Re sponse is CPBS list of supported index s Values for storage SM SIM s phone book Example AT CPBS SM Select active phone book memory to be the SIM card memory AT CPBW Write Phone Book Entry This command writes a phone book entry in a location number in dex in the...

Page 22: ...Re sponse is CPBW list of supported in dex s nlength tlength Parameters index phone book memory location number number phone number type type of number 129 for normal default and 145 forinterna tional access character added to number text text field related to entry nlength maximum length of the field number tlength maximum length of the field text Example AT CPBS SM Select active phone book mem o...

Page 23: ... alpha fields in the phone book memory Syntax AT CSCS chset Select character set AT CSCS Query current setting Response is CSCS chset AT CSCS Show supported character sets Response is CSCS list of supported chset s Values for chset GSM GSM default alphabet this setting eas ily causes software flow control XON XOFF problems HEX character strings consist only of hexa decimal numbers from 00 to FF e ...

Page 24: ... Values for rssi 0 113dBm or less 1 111 112dBm 2 30 109 53 dBm 31 51 dBm or greater 99 not known or not detectable 2 4 Computer Data Adapter Interface Commands ATE Command Echo This command determines whether or not characters that are re ceivedfromtheDTEareechoedinthecommandmode Syntax ATE 0 Disable echoing ATE1 Enable echoing ATQ Result Code Suppression This command determines whether or not res...

Page 25: ... 10 ATX2 Enable response codes 0 5 10 ATX3 Enable response codes 0 5 7 10 ATX4 Enable response codes 0 5 7 8 10 ATX5 Enable all response codes AT C Define DCD Usage This command determines how the state of the DCD V 24 signal re lates to the detection on the received line signal from the distant enSyntax AT C 0 Keep DCD always ON AT C1 Enable normal DCD usage This is always ON with 09i 18i PremiCe...

Page 26: ...trol AT K3 Set hardware flow control CTS RTS AT K4 Set software flow control XON XOFF AT Q Define Communications Mode Option This command defines the dialling and on line op tions Syntax AT Q 0 Enable normal asynchronous operation AT Q2 Enable DTR controlled dial DTR OFF to ON caus es a call to be made to the number stored in the dial slot one 1 DTR ON to OFF hangs up the phone AT S Define DSR Opt...

Page 27: ...g character framing settings of the data adapter and your communications application close and restart the communications application For repeated use of these settings you should issue the AT commands AT W and AT Y Syntax AT ICF format parity Set character framing AT ICF Query current setting Response is ICF format parity AT ICF Show valid range of parameters Response is ICF 1 6 0 1 4 Parameters ...

Page 28: ...eflowoftransmitteddatafromtheDTE Syntax AT IFC DCE_by_DTE DTE_by_DCE Set flow control AT IFC Query current setting Response is IFC DCE_by_DTE DTE_by_DCE AT IFC Show valid range of parame ters Response is IFC 0 3 0 2 Parameters DCE_by_DTE 0 no flow control 1 XON XOFF software flow control 2 CTS RTS hardware flow control 3 both XON XOFF and CTS RTS flow control DTE_by_DCE 0 no flow control 1 XON XOF...

Page 29: ...he GSM supplementary service CLIP Call ing Line Identification Presentation that enables a called subscriber to obtain the calling line identity CLI of the calling party when re ceiving a mobile terminated call With this command the user can enable or disable the presentation of the CLI on the DTE It has no effect on the execution of the supplementary service CLIP in the network Syntax AT CLIP mod...

Page 30: ...ic representation of a number corresponding to the entry found in the data adapter phone book AT COLP Connected Line Identification Presentation This command refers to the GSM supplementary service COLP Con nected Line Identification Presentation that enables a calling sub scriber to obtain the connected line identity COL of the called party after setting up a mobile originated call The command en...

Page 31: ... data adapter to the computer If enabled the result code is transmitted at the point during the connect negotia tion during which the data adapter has determined the speed and quality of service to be used before any error control or data com pression reports are transmitted and before any final result code e g CONNECT is transmitted Syntax AT CR mode Set service reporting control mode AT CR Query...

Page 32: ...AT DR Show supported values Response is DR 0 1 Parameters mode 0 data compression reporting disabled 1 data compression reporting enabled compr NONE data compression not in use V42B V 42bis in use in both directions V42B RD V 42bis in use in receive direction only V42B TD V 42bis in use in transmit direction only MNP5 MNP5 in use AT ILRR DTE DCE Local Rate Reporting This command controls whether o...

Page 33: ... included for compatibility rea sons Syntax ATB n AT CBST Select Bearer Service Type This command selects the bearer service name with data rate speed and the connection element ce to be used when data calls are originated The selected bearer service rate and connec tion element are used both in mobile originated and mobile termi nateddataandalternatetypeofcallsduringdatamode Syntax AT CBST speed ...

Page 34: ...0 autobauding automatic selection of speed 1 300 bps V 21 2 1200 bps V 22 3 1200 75 bps V 23 4 2400 bps V 22bis 5 2400 bps V 26ter 6 4800 bps V 32 7 9600 bps V 32 name 0 asynchronous modem 2 PAD Access asynchronous ce 0 transparent 1 non transparent 2 both transparent preferred 3 both non transparent preferred ...

Page 35: ...line containing the failure information given by the GSM network in a textual for mat Syntax AT CEER Display error report Response is CEER report AT CRLP Radio Link Protocol This command selects the Radio Link Protocol parameters Syntax AT CRLP iws mws T1 N2 Set RLP parameters AT CRLP Query current setting Response is CRLP iws mws T1 N2 AT CRLP Show valid values Response is CRLP 0 61 0 61 39 255 1...

Page 36: ... AT command help screen AT C Start SMS Interpreter This command activates the Short Message Service Interpret er Syntax AT C Activate SMS interpreter Commands available in the SMS Interpreter SEND Send a short message STORE STORE SIM Store a short message to active or SIM memory DIR DIR SIM DIR NEW A short message stored in ac tive or SIM memory is displayed SHOW Display current SMS transmis sion ...

Page 37: ...wing values NONE Waiting time will be determined by net work 0 143 n 1 x 5 min 144 167 12 hours n 143 x 30 min 168 196 n 166 x 24 hours 197 255 n 192 x 1 week REPLY_PATH ON REPLY_PATH OFF The recipient is allowed to reply to the received message at the sender s ex pense when the reply path isset to on CONFIRMATION ON CONFIRMATION OFF Sets the confirmation of message deliv ery to on or off DATA_BIT...

Page 38: ...tocol Select the protocol supported by the re ceiver of the short message The Service Cen tre of the network provides the conversion of the message The remote party must be connect ed to an appropriate terminal device protocol may have following values DEFAULT TELEX FAX_G3 FAX_G4 VOICE ERMES TELE TEX UCI X 400 TYPE0 TYPE1 TYPE2 TYPE3 TYPE4 TYPE5 TYPE7 AT T Enter SMS Block Mode Protocol This comman...

Page 39: ...AT CESP Enter SMS Block Mode Protocol Sets the data adapter in the SMS Block mode The final result code OK or 0 shall not be returned until block mode is exit ed Syntax AT CESP Activate SMS Block mode 2 8 SMS Commands Used in Text and PDU Modes AT CSMS Select Message Service This commands selects the messaging service and returns the type of messages supported The supported service is specified by...

Page 40: ...storages to be used for reading de leting m1 writing sending m2 and receiving m3 short messag es Amount of used and available message locations in each memory is returned as re sponse Syntax AT CPMS m1 m2 m3 Select preferred storage Response is CPMS used1 total1 used2 total2 used3 total3 AT CPMS Current setting query Response is CPMS m1 used1 total1 m2 used2 total2 m3 used3 total3 AT CPMS Show sup...

Page 41: ...ntax AT CMGF mode Select message format AT CMGF Query current setting Response is CMGF mode AT CMGF Show supported values Response is CMGF list of supported mode s Values for mode 0 PDU mode 1 Text mode AT CSCA Service Centre Address This command updates the service centre address through which mobile originated short messages are transmit ted Syntax AT CSCA sca type Set service centre address AT ...

Page 42: ... parameter values AT CSMP Current setting query Response is CSMP fo vp pid dcs Parameters fo depending on the command or result code first octet of SMS DELIVER SMS SUBMIT default 17 or SMS STA TUS REPORT in integer format vp depending on SMS SUBMIT fo setting validity period either in integer format default 167 or in time string format pid protocol identifier in integer format default 0 dcs SMS Da...

Page 43: ... values defined in com mands CSCA and CSMP nor length type in CMT CMGL CMGR result codes for SMS text mode 1 show all the values in result codes AT CSCB Select Cell Broadcast Message Types This command selects which types of cell broadcast messages are to be received by the termi nal Syntax AT CSCB mode mids dcss Select message types AT CSCB Query current setting Response is CSCB mode mids dcss AT...

Page 44: ... example 0 3 5 AT CSAS Save Settings This command saves active message service settings to a non vola tile memory Saved values are not automatically restored after ter minal power up Syn tax AT CSAS profile Save settings AT CSAS Show valid values Response is CSAS list of supported profile s Values for profile 1 settings are stored to terminal memory AT CRES Restore Settings This command restores m...

Page 45: ...ailed description of the syntax of indication responses Syntax AT CNMI mode mt bm ds bfr Select indication procedure AT CNMI Query current setting Response is CNMI mode mt bm ds bfr AT CNMI Show valid values Response is CNMI lists of supported mode s mt s bm s ds s bfr s Parameters mode 0 buffer all indications in data adapter 1 no indications when the DTE DCE link is re served on line data mode 2...

Page 46: ... a result code CMT 3 class 3 received messages are routed directly to the DTE using a result code CMT and messages of other classes using a result indication CMTI bm 0 no cell broadcast indications are routed to the DTE 2 new cell broadcast messages are routed directly to the DTE using a result code CBM ds 0 no status reports are routed to the DTE 1 status reports are routed to the DTE using a re ...

Page 47: ... the next sec tion Syntax AT CMGL stat List messages Response is CMGL index stat addr scts type length CR LF data and it is repeated several times if more than one short message is listed AT CMGL Show valid values Response is CMGL list of supported stat s Parameters stat REC UNREAD received unread messages default REC READ received read messages STO UNSENT stored unsent messages STO SENT stored se...

Page 48: ...SMS text mode and the PDU mode form of the command is described in the next sec tion Syntax AT CMGR index Read message Response for received messages CMGR stat addr scts type fo pid dcs sca typesca length CR LF data Response for stored messages CMGR stat addr type fo pid dcs vp sca typesca length CR LF data Parameters index location number stat REC UNREAD received unread message REC READ received ...

Page 49: ...rmal and 145 for international access number contains character length length of data field data user data vp depending on SMS SUBMIT fo setting valid ity period either in integer format default 167 or in time string format AT CMGS Send Message This command sends a message to the network A message refer ence value mr is returned to the DTE on successful message de livery Sending can be cancelled b...

Page 50: ...This command sends a message with the location value index from a preferred message storage selected with the AT CPMS com mand If a new recipient address addr is given it will be used in stead of the one stored with the message Reference value mr is returned to the DTE on successful message deliv ery Syntax AT CMSS index addr type Send message Response is CMSS mr Parameters index location number m...

Page 51: ...as spec ified in the command AT CMGS This command form applies only to the SMS text mode and the PDU mode form of the command is de scribed in the next sec tion Syntax AT CMGW addr type stat CR text ctrl Z ESC Store message Response is CMGW index Parameters addr origin or destination address in string format type type of origin or destination address 129 for normal and 145 for international access...

Page 52: ...List Messages This command returns messages with a status value stat from a preferred message storage selected with the AT CPMS com mand Syntax AT CMGL stat List messages Response is CMGL in dex stat length CR LF pdu and it is repeated several times if more than one short message is listed AT CMGL Show valid values Response is CMGL list of supported stat s Parameters stat 0 received unread message...

Page 53: ...tion number stat 0 received unread message 1 received read message 2 stored unsent message 3 stored sent message length length of the actual PDU in octets pdu GSM 03 40 Protocol Data Unit in hexadecimal format AT CMGS Send Message This command sends a message to the network The message refer ence value mr is returned to the DTE on successful message de livery Sending can be cancelled by using the ...

Page 54: ...ult the message status will be set to stored unsent but the parameter stat also allows other status values to be given Entering of text is done similarly as specified in the command AT CM GS Syn tax AT CMGW length stat CR pdu ctrl Z ESC Store message Response is CMGW index Parameters length length of the actual PDU in octets stat 0 received unread message 1 received read message 2 stored unsent me...

Page 55: ...ace character 8 S7 Wait for connection completion seconds 0 connection waiting time is unlimited 60 S8 Sets the duration in seconds for the pause option in the dial command 2 S10 DCD OFF to hang up delay seconds 10 Setting 255 signifies that the connection will not be cleared even if the DCD drops Default is 6 seconds 100 S12 Escape Guard Time seconds 50 0 escape disabled 50 S14 For changing the S...

Page 56: ... to define the DCD signal usage The DCD signal is always on n 0 or not present or else used in the normal way n 1 AT Dn to define the DTR signal usage AT Sn to define the DSR signal usage The DSR signal is always on n 0 or not present or else used in the normal way n 1 Bit mapped options bits 3 4 5 and 6 The default values are shown in bold bits 4 3 00 AT D0 01 AT D1 10 AT D2 11 AT D3 bit 5 0 AT C...

Page 57: ...10 ATX3 111 ATX4 001 ATX5 E g if bit 4 is 0 and bits 5 and 6 are 1 the command ATX3 has been executed 16 S25 Detect DTR change seconds 0 S27 For defining the communication mode option and changing the S27 Register use the ATQn command AT Q0 for the normal asynchronous operation AT Q2 for the DTR controlled dialling on the DTR ON OFF transition the terminal adapter automatically dials the number in...

Page 58: ...dapter in a decimal format The ID can be displayed with the ATI0 command 0 S40 Type of number 0 Unknown 1 International 2 National 3 Network specific 4 Dedicated PAD 0 S41 Numbering plan 0 Unknown 1 ISDN telephony E 163 E 164 2 Data X 121 3 Telex F 69 4 National 5 Private 1 S42 Radio Link Protocol uplink window size 0 61 61 S43 Radio Link Protocol downlink window size 0 61 61 S44 Radio Link Protoc...

Page 59: ...ric or ver bose This is set with the command CMEE err values numeric format followed by verbose format 0 terminal failure 1 no connection to terminal 2 terminal adapter link reserved 3 operation not allowed 4 operation not supported 10 SIM not inserted S45 Radio Link Protocol N2 repetition count 1 255 6 S46 Force Data Compression only for mobile to mobile connections 0 Disabled 1 Data compression ...

Page 60: ... error related to mobile equipment or the network The operation is similar to the ERROR result code None of the following commands in the same command line is executed Neither the ERROR nor the OK result code will be returned ERROR is returned normally when the error is related to syntax or invalid parameters err values used by common messaging commands 300 ME failure 301 SMS service of ME reserve...

Page 61: ...he response CRING type indicates an incoming call if the ex tended format incoming call indication is selected by the command AT CRC 1 type values REL ASYNC asynchronous non transparent data call ASYNC synchronous transparent data call FAX facsimile call TS62 VOICE normal voice TS11 VOICE XXX voice followed by data BS 81 XXX is REL ASYNC or ASYNC ALT VOICE XXX alternating voice data voice first BS...

Page 62: ...ived Message Routing This response is used to carry a received short message to DTE when direct routing has been activated with the AT CNMI command The response CMT length CR LF pdu is used when PDU mode is enabled and CMT addr scts type fo pid dcs sca typesca length CR LF data when text mode is used length length of the actual PDU in octets or length of data field pdu service centre address follo...

Page 63: ...hen direct routing has been activated with the AT CN MI command The response CDS length CR LF pdu is used when PDU mode is enabled and CDS fo mr addr type scts dt st when text mode is used length length of the actual PDU in octets pdu service centre address followed by GSM 03 40 Protocol Data Unit in hexadecimal format fo first octet of SMS STATUS REPORT in integer format mr message reference addr...

Page 64: ...scts service centre time stamp type type of originator address 129 for normal and 145 for international access number contains character fo first octet of SMS DELIVER in integer format pid protocol identifier in integer format dcs SMS Data Coding Scheme sca service centre address typesca type of service centre address 129 for normal and 145 for international access number contains character 4 9 CD...

Page 65: ...Protocol Data Unit in hexadecimal format fo first octet of SMS STATUS REPORT in integer format mr message reference addr receiver address type type of receiver address 129 for normal and 145 for international access number contains character scts service centre time stamp dt discharge time st status ...

Page 66: ... DCE Data Circuit Terminating Equipment i e here the Data adapter DSR Data Set Ready DTE Data Terminal Equipment see also TE below DTR Data Terminal Ready ME Mobile Equipment which in most cases is a mobile phone RTS Request To Send TA Terminal Adapter TE Terminal Equipment which in most cases is a computer ...

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