Method, apparatus and system for transmitting signal
AssigneeHuawei Technologies Co., Ltd.
InventorLun Lian
Life of this patent
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Abstract
The present invention relates to communication technologies, and discloses a method, an apparatus, and a system for transmitting a signal to ensure normal communication between the calling party and the called party. The method includes: A first node sends Global Text Telephone (GTT) signal encoded in a Cellular Text Telephone Modem (CTM) format to a second node after the first node receives the GTT signal and if transmission between the first node and the second node is based on an Internet Protocol (IP) network. The present invention is primarily applicable to the GTT service.
Claims17
A method for transmitting a signal, comprising:
- receiving, by a first node, a Global Text Telephone (GTT) signal;
- sending, by the first node, the GTT signal encoded in a Cellular Text Telephone Modem (CTM) format to a second node, if determining that transmission between the first node and the second node is based on an Internet Protocol (IP) network.
An apparatus, comprising:
- a receiving unit, configured to receive a Global Text Telephone (GTT) signal;
- and
- a sending unit, configured to send the GTT signal encoded in a Cellular Text Telephone Modem (CTM) format to a next hop of the GTT signal if determining that transmission between the apparatus and the next hop is based on an Internet Protocol (IP) network.
An apparatus, comprising:
- a receiving unit, configured to receive a Global Text Telephone (GTT) signal encoded in a Cellular Text Telephone Modem (CTM) format;
- and
- a converting unit, configured to convert the GTT signal in the CTM format into a GTT signal in a format of an international text telephone modem standard, wherein the format of the international text telephone modem standard comprises V.21, EDT, Bell 103, V.23, DTMF, V.18, and Baudot.
A system, comprising:
- an end office of mobile services, configured to send a Global Text Telephone (GTT) signal encoded in a Cellular Text Telephone Modem (CTM) format to a gateway office if determining that transmission between the end office of mobile services and the gateway office is based on an Internet Protocol (IP) network;
- and
- the gateway office, configured to receive the GTT signal in the CTM format from the end office of mobile services.
An apparatus, comprising:
- a receiving unit, configured to receive a Global Text Telephone (GTT) signal;
- a converting unit, configured to determine that the GTT signal received by the receiving unit is in a format of an international text telephone modem standard, and convert the GTT signal into a GTT signal in a Cellular Text Telephone Modem (CTM) format;
- and
- a sending unit, configured to send the GTT signal in the CTM format, and send a service message that comprises an identifier of the GTT signal in the CTM format.
Dependencies are inferred from the claim text.