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What is a Voice Modem (622 words) |
 | Voice generally means that the modem is capable, with appropriate software, of supporting telephone answering machine functions: the modem can 'record' and 'play' to the Windows wave device. |
| Voice modem chipset makers include in the driver or firmware code to interface to the wave device, but do not develop the software that provides voice functionality. |
| The chipsets for voice, speakerphone and even most data/fax modems are capable of caller id, but the modem must include additional components: the caller id signal is sent by the phone company between the first and second rings while the phone, or modem is still on-hook. |
| Cisco - Troubleshooting One Way Voice Issues (2825 words) |
| The causes of one-way audio in IP Telephony can be varied, but the root of the problem usually involves IP routing issues. |
| One-way voice can occur in Media Gateway Control Protocol (MGCP) gateways if the source interface for signaling and media packets is not specified. |
| The voice path is established in the backward direction at the start of the RTP stream. |
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