GSM-модемы

GSM-модемы, это небольшие устройства в виде флешки, подключаемые к USB-порту компьютера и способные передавать данные и голос через мобильные сети GSM.

Далеко не все модемы этого типа обладают возможностью выполнять голосовые звонки, кроме того, возможность выполнять голосовые звонки может быть заблокирована оператором связи, у которого вы приобрели модем. Поэтому наличие голосовых функций у GSM-модема следует уточнять перед покупкой модема.

Определение наличия голосовых функций модема

Для рассылки или приёма SMS наличие голосовых функций не имеет значения, однако для автоматического обзвона или для работы в качестве программного автоответчика GSM-модем должен иметь голосовые функции. Проанализировав журнал работы программы, можно определить наличие или отсутствие голосовых функций у модема.

Если в журнале присутствует строка

 AT^DDSETEX?<cr> - <cr><lf>ERROR<cr><lf>

значит, модем не имеет голосовых функций.

Если же строка имеет вид:

 AT^DDSETEX?<cr> - <cr><lf>OK<cr><lf>

значит, модем поддерживает приём и передачу голоса.

Программа DC-Unlocker пишет voice Enabled. Программа провайдера телефонной связи звонит через модем нормально

DC-Unlocker, во-первых, не всегда пишет правильно, а во-вторых, голос может быть разрешен, но отключен. В некоторых случаях его можно включить командой AT^CVOICE=0.

Стандартные программы провайдеров сотовой связи, устанавливающиеся вместе с модемом, звонят, используя возможности модема по передаче данных, а не голосовые функции. Так что это никак не говорит о доступности голосовых функций модема.

Получение баланса

Для получения баланса (функцией GetBalance) SIM-карты необходимо в строке открытия устройства указать USSD запрос на получение баланса вашего оператора связи. Например, для оператора Билайн запрос будет иметь вид:

BalanceQuery=*102#;
Полная строка соединения будет выглядеть так: "Modem\\COM6;BalanceQuery=*102#;"

Помимо этого доступны еще ряд параметров:

• BalanceEncoding - кодировка USSD запроса, допустимы значения: None, 7bit, UCS2;
• BalanceDecoding - декодировка USSD запроса, допустимы значения: None, UCS2;
• BalanceExtract - регулярное выражение для извлечения значения баланса из USSD ответа. Регулярное выражение в формате регулярных выражений с++. Например: BalanceExtract={[0-9\.]*}р;

CMS ERROR. Список ошибок при отправке сообщений

Номер ошибки	Краткое описание	Расширенное описание
1	"Unassigned (unallocated) number"	This cause indicates that the destination requested by the Mobile Station cannot be reached because, although the number is in a valid format, it is not currently assigned (allocated).
8	"Operator determined barring"	This cause indicates that the MS has tried to send a mobile originating short message when the MS's network operator or service provider has forbidden such transactions.
10	"Call barred"	This cause indicates that the outgoing call barred service applies to the short message service for the called destination.
17	"Network failure".	This cause is sent to the MS if the MSC cannot service an MS generated request because of PLMN failures, e.g. problems in MAP.
21	"Short message transfer rejected"	This cause indicates that the equipment sending this cause does not wish to accept this short message, although it could have accepted the short message since the equipment sending this cause is neither busy nor incompatible.
22	"Congestion".	This cause is sent if the service request cannot be actioned because of congestion (e.g. no channel, facility busy/congested etc.).
22	"Memory capacity exceeded".	This cause indicates that the mobile station cannot store the incoming short message due to lack of storage capacity.
	Note that error "22" is defined twice. It is likely that "CMS ERROR 22" would be due to the first definition, while the second definition is likely to only be a status code for delivery reports.
27	"Destination out of service"	This cause indicates that the destination indicated by the Mobile Station cannot be reached because the interface to the destination is not functioning correctly. The term "not functioning correctly" indicates that a signalling message was unable to be delivered to the remote user; e.g., a physical layer or data link layer failure at the remote user, user equipment off-line, etc.
28	"Unidentified subscriber"	This cause indicates that the subscriber is not registered in the PLMN (i.e. IMSI not known).
29	"Facility rejected"	This cause indicates that the facility requested by the Mobile Station is not supported by the PLMN.
30	"Unknown subscriber"	This cause indicates that the subscriber is not registered in the HLR (i.e. IMSI or directory number is not allocated to a subscriber).
38	"Network out of order"	This cause indicates that the network is not functioning correctly and that the condition is likely to last a relatively long period of time; e.g., immediately reattempting the short message transfer is not likely to be successful.
41	"Temporary failure"	This cause indicates that the network is not functioning correctly and that the condition is not likely to last a long period of time; e.g., the Mobile Station may wish to try another short message transfer attempt almost immediately.
42	"Congestion"	This cause indicates that the short message service cannot be serviced because of high traffic.
47	"Resources unavailable, unspecified"	This cause is used to report a resource unavailable event only when no other cause applies.
50	"Requested facility not subscribed"	This cause indicates that the requested short message service could not be provided by the network because the user has not completed the necessary administrative arrangements with its supporting networks.
69	"Requested facility not implemented"	This cause indicates that the network is unable to provide the requested short message service.
81	"Invalid short message transfer reference value"	This cause indicates that the equipment sending this cause has received a message with a short message reference which is not currently in use on the MS-network interface.
95	"Invalid message, unspecified"	This cause is used to report an invalid message event only when no other cause in the invalid message class applies.
96	Invalid mandatory information"	This cause indicates that the equipment sending this cause has received a message where a mandatory information element is missing and/or has a content error (the two cases are indistinguishable).
97	"Message type non-existent or not implemented"	This cause indicates that the equipment sending this cause has received a message with a message type it does not recognize either because this is a message not defined or defined but not implemented by the equipment sending this cause.
98	"Message not compatible with short message protocol state"	This cause indicates that the equipment sending this cause has received a message such that the procedures do not indicate that this is a permissible message to receive while in the short message transfer state.
99	"Information element non-existent or not implemented"	This cause indicates that the equipment sending this cause has received a message which includes information elements not recognized because the information element identifier is not defined or it is defined but not implemented by the equipment sending the cause. However, the information element is not required to be present in the message in order for the equipment sending the cause to process the message.
111	"Protocol error, unspecified"	This cause is used to report a protocol error event only when no other cause applies.
127	"Interworking, unspecified"	This cause indicates that there has been interworking with a network which does not provide causes for actions it takes; thus, the precise cause for a message which is being send cannot be ascertained.
0...127		Other values in this range are reserved, defined by GSM 04.11 Annex E-2 values
128	Telematic interworking not supported x
129	Short message Type 0 not supported x x
130	Cannot replace short message x x
143	Unspecified TP-PID error x x
144	Data coding scheme (alphabet) not supported x
145	Message class not supported x
159	Unspecified TP-DCS error x x
160	Command cannot be actioned x
161	Command unsupported x
175	Unspecified TP-Command error x
176	TPDU not supported x x
192	SC busy x
193	No SC subscription x
194	SC system failure x
195	Invalid SME address x
196	Destination SME barred x
197	SM Rejected-Duplicate SM x
198	TP-VPF not supported X
199	TP-VP not supported X
208	SIM SMS storage full x
209	No SMS storage capability in SIM x
210	Error in MS x
211	Memory Capacity Exceeded X
212	SIM Application Toolkit Busy x x
255	Unspecified error cause
128...255		Other values in this range are reserved, defined by GSM 03.40 subclause 9.2.3.22 values
300	ME failure
301	SMS service of ME reserved
302	operation not allowed
303	operation not supported
304	invalid PDU mode parameter
305	invalid text mode parameter
310	SIM not inserted
311	SIM PIN required
312	PH-SIM PIN required
313	SIM failure
314	SIM busy
315	SIM wrong
316	SIM PUK required
317	SIM PIN2 required
318	SIM PUK2 required
320	memory failure
321	invalid memory index
322	memory full
330	SMSC address unknown
331	no network service
332	network timeout
340	no +CNMA acknowledgement expected
500	unknown error
256...511		Other values in this range are reserved
512...		manufacturer specific