是否有用于拨号连接的库/组件?
我想通过 VoIP 拨号。 是的,我知道这几乎是不可能的。 我听说软调制解调器使用 DSP 软件,但我猜其代码是特定于硬件的。 如果我只能隔离发出调制解调器信号的代码,我就可以在我的项目中使用它。 有人听说过可以满足我需求的图书馆吗?
PS:iaxmodem仅调制传真信号。
I want to dial-up through VoIP. Yes, I know that it's almost impossible. I have heard that softmodems use software for DSP, but I guess the code its hardware specific. If I only could isolate the code that makes the modem signal I could use it on my project. Anyone ever heard about a library that would fullfill my needs?
PS: iaxmodem only modulates fax signals.
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我不确定这是否对您有帮助,但请查看 Dialogic SDK 及其API 手册。
我一直在 Dialogic 语音/传真板上做一些工作,并且在我正在使用的一台机器上我已经设置了 SDK,但没有安装板(它们非常昂贵)。
我注意到,在这台机器上,由于我没有安装该板,所以它为我提供了一个由他们的软件管理的 softIP 虚拟硬件板。
我自己还没有玩过 VoIP 的东西,但它可能会提供您所需要的一些东西。
这是屏幕截图。
下载和安装 SDK 是免费的,但当您输入详细信息时,他们可能会打电话给您并尝试向您出售主板。
I'm not sure if this will help you, but take a look at the Dialogic SDK and it's API manuals.
I've been doing some work on a Dialogic voice/fax board, and on one of the machines that I'm using I've set up the SDK but without having a board installed (they're pretty expensive).
I've noticed that on this machine, since I don't have the board installed, it's provided me with a softIP virtual-hardware board, managed by their software.
I haven't played with the VoIP stuff myself, but it might provide some of what you need.
Here's a screenshot.
Downloading and installing the SDK is free, though when you enter your details they will probably give you a call and try to sell you a board.
大多数电话音频编解码器使用感知编码来压缩数据。 此编码无法在目标处重现源的所有频率,因为它忽略了不相关的频率。 因此,您不能不使用通过 GSM 或 VoIP 将二进制数据编码为音频的数据编码(如调制解调器那样)。
除此之外:拥有 VoIP 意味着拥有 IP 连接,那么为什么不通过 IP 传输数据(如果需要通过 VPN 来确保安全,而不是尝试通过 VoIP 使用调制解调器?
Most telephone audio codecs compress the data using perceptual coding. This coding can not reproduce all frequencies of the source at the target, as it omits the ones that are irrelevant. Therfore you can not use a data encoding that encodes binary data into audio frequencies (like a modem does) with GSM or VoIP.
Besides that: having VoIP means having an IP connection, so why not transfer the data via IP (if it needs to be secure via a VPN instead of trying to use a modem over VoIP?