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If it does not receive data from the calling modem within a set amount of time, it disconnects the line. Not standart send_sms and e.t.c2How to join received multipart SMS ( GSM Modem )( C# )2GSM Modem Send Message in UCS2 format error2How to reject or accept an incoming call to Products Serial/IP COM Port Redirector for serial servers COM/IP COM Port Redirector the software modem for TCP/IP DialOut/EZ COM Port Redirector for modem servers TacServe COM Port Server build your own What is the most expensive item I could buy with £50?

Note that I can send SMS successfully. Use "top" (provided you've set it to display the port number) or type "ps -alxw". In the mean time can anyone offer me a clue as to what no carrier means. This field shows the fax number exactly as dialed by the modem.

This error is sometimes due to having two serial drivers: one a module and the other compiled into the kernel. Look at the debugging info and see what is going on. If you think you know what IRQ say ttyS2 is using then you may look at /proc/interrupts to find what else (besides another serial port) is currently using this IRQ. Linux's network stack uses the NO CARRIER status for a network interface that is turned on ("up") but cannot be connected because the Physical Layer is not operating properly, e.g.

You might also get "input overrun" error messages (or find them in logs). giving hollow objects a thickness How to decrypt a broken S/MIME message sent by Outlook? When the computer hears the tone from the server it syncs itself to it then the data transfer starts between computer and server. This can happen if you have an early V.90 modem that first tries to negotiate a high speed X2 or K56flex protocol.

NO CARRIER From Wikipedia, the free encyclopedia Jump to: navigation, search "No Carrier" redirects here. If it shows anything less than a 16550A, this may be your problem. So if you first start a data call with ATD1234 then you can after that call ends give ATDL to set up a new data call to the same number. Just type "wvdialconf ".

In olden days, if a PC was shutdown by just turning off the power, a bogus lockfile might remain and then later on one would get this bogus message and not There is no fax hardware on the receiving end which could include the call being answered by an answering machine, a person, etc. 2. But if and when setserial runs from a start-up script, it changes the IRQ's and displays the new (and hopefully correct) state on on the startup screen. Bug note (reported in 2002): Due to a bug in some kernel 2.4 versions, the port number may be missing and you will only see "ttyS" (no port number).

By using this site, you agree to the Terms of Use and Privacy Policy. On both sides of the +++ sequence there must be about 1 second of delay (nothing sent during "guard time"). These two protocols are obsolete and some ISP servers will drop the connection (hang up) when this happens since they have no understanding of such protocols and don't wait around long See "What are UARTS" in the Serial-HOWTO.

Someone else may be using another telephone on the same line. Most Hayes compatible modems do this OK with &D3. or 3. Then if the process is no longer needed, it may be gracefully killed by "kill 100".

Is there any job that can't be automated? Device or resource busy" This means that the device you are trying to access (or use) is supposedly busy (in use) or that a resource it needs (such as an IRQ) If you first set up a voice call with ATD1234; then just giving ATDL will set up a data call to number 1234, so the modem only reuses the number and Unfortunately, if your modem is in "online data" mode, wvdialconf will report "No modem detected".

Check your modem manual (if you have one). There are two possible cases when you see this message: There may be a real resource conflict that is being avoided. A dial or answer command was aborted while in progress. As a quick check to see if it really is an interrupt problem, set the IRQ to 0 with "setserial".

Can I initiate a data call using a dial up modem also, or it is for GSM modems only? –Abraham Jul 1 '15 at 3:48 add a comment| Your Answer Why germinate seeds outside of soil? Another reason may be that whatever is on the serial port (such as a modem, terminal, printer) doesn't work as fast as you thought it did. The modem could actually be in use (busy).

An example of this is where the device has negated CD and the CD pin on your PC is negated (negative voltage). 18.21 "Operation not supported by device" for ttyS? See Probing. 18.14 Linux Creates an Interrupt Conflict (your PC has an ISA slot) If your PC has a BIOS that handles ISA (and likely PCI too) then if you find Another way to try to fix this is to send +++ to the modem to tell it to escape back to "command mode" from "online data mode". It may be just an invisible character so all you notice is that the cursor jumps down one line.

See What is Setserial "stty" shows and sets the configuration of a port (except for that handled by "setserial"). thoughts please. The ``resource busy'' part often means (example for ttyS2) ``You can't use ttyS2 since another device is using ttyS2's interrupt.'' The potential interrupt conflict is inferred from what "setserial" thinks. But a real conflict can be created if "setserial" has told the kernel incorrect info.

If too many are reserved, the BIOS may not be able to find a free IRQ and will erroneously assign an IRQ to the serial port that creates a conflict. Sum of neighbours (KevinC's) Triangular DeciDigits Sequence How would they learn astronomy, those who don't see the stars? For the uploading case: If you have set a high DTE speed (like 115.2k) then flow from your modem to your PC may work OK but uploading flow in the other Due to the popularity of Hayes modems during the heyday of dial-up connectivity, most other modem manufacturers supported the Hayes command set.

But for USR Courier, SupraFax, and some other modems, you must set &D2 (and S13=1 in some cases). This message is easy to understand if it only means that the device is busy (in use). NO CARRIER status message of an ethernet network interface being up but with no cable plugged in Current use[edit] As modems have progressed to pack more bits per second over a This is the program that I use to send SMS: import time import serial recipient = "+98xxxxxxxxxx" message = "Test" phone = serial.Serial("COM10", 115200, timeout=5) try: time.sleep(0.5) phone.write(b'ATZ\r') time.sleep(0.5) phone.write(b'AT+CMGF=1\r') time.sleep(0.5)

Is there a role with more responsibility? It you don't own it then it will work for you if it shows rw- in cols. 8 & 9 which means that everyone has read and write permission on it. See winmodem_ Your modem is disabled since both the BIOS and Linux failed to enable it.