摘要:
A method for synchronously implementing media switch in gateways used for IP FAX is disclosed. The method comprises sending a message for notification of fax event from a media gateway which firstly detects a fax event to the other media gateway of the fax event; implementing a media switch in the media gateway which firstly detects the fax event into fax mode; implementing a media switch in the other media gateway of the fax event into fax mode after receiving said message for notification of fax event. Therefore, the method of the invention overcomes the disadvantages of the related art and more particularly prevents fax failure due to difference of routing for a born network and cross-domain. The IP FAX used by the method of the invention can be applied broadly as the method also improves compatibility and reliability for IP FAX.
摘要:
An interconnecting device for relaying a voice call and a fax communication of a communication terminal between an analog line and a digital line, the digital line having a bandwidth being controlled by a control apparatus, the interconnecting device comprising: a start signal receiving unit for receiving a fax communication start signal from the communication terminal through the analog line, the fax communication start signal indicating a start of the fax communication; and a request signal sending unit for requesting of the control apparatus that the bandwidth of the digital line available to the interconnecting device be expanded from in the voice call when the start signal receiving unit receives the fax communication start signal.
摘要:
In a versatile communication device having a telephone function and a facsimile function, an erroneous detection of an on-hold melody as a control signal, such as a calling tone (CNG) signal, is prevented when the on-hold melody is played during an on-hold period of the telephone, thereby preventing the device from mistakenly switching connection to the facsimile function during the on-hold period. Further, the on-hold melody containing a signal component of the CNG signal or other control signal is prevented from sending to the remote device, so the remote device provided with a facsimile function does not switch to a facsimile mode during the on-hold status of the voice communication.
摘要:
Reliable access to an audio and facsimile message storage and retrieval system (1) is accomplished through a defined listening procedure on incoming calls (1000) to differentiate voice message clients from fax clients. Accommodation of a human caller during a listening procedure is accomplished by generation of a ring tone (1005) immediately after connection of the call comparable to that normally expected by a caller during a typical call attempt (ringback). This precludes the potential for a "deadline" perception on the part of the voice messaging caller. Differentiating between fax-sending clients and fax-receiving clients is accomplished by detection of calling station tone (CNG) or called station tone (CED) with the accommodation of manual operation of fax machines by classification of the call as voice call after an appropriate listening period with a properly worded announcement instructing initiation of manual fax transmission followed by CNG tone detection in combination with voice message recording.