We tried the Ovation out first on a MacBook Pro running Mac OS X 10.4.11 and then on a Windows XP SP2 machine - an Eee PC, to be precise. Novatel Wireless supplies drivers for the Mac on an accompanying CD, but the PC-oriented software auto-runs off the modem itself. So far the Mac drivers only go up to Tiger, though they apparently will run under Leopard, albeit with some issues (PDF).
3g Hsupa Modem Software Download
Novatel Wireless' drivers tie into Mac OS X's own Networks preferences pane and Internet Connect utility, so there's no readout of download bandwidth. The Mobilink Lite software for Windows does, and more besides, including data transfer counters and a utility for sending and receiving text messages.
Switching to T-mobile's HSDPA service, in both north and central London, we got an average speed of around 336.4Kb/s when downloading the music file, peaking at 419.6Kb/s, according to Novatel's software. Pinging Register Hardware half a dozen times yielded an average latency of 594ms.
The introduction of microcomputer systems with internal expansion slots made small internal modems practical. This led to a series of popular modems for the S-100 bus and Apple II computers that could directly dial out, answer incoming calls, and hang up entirely from software, the basic requirements of a bulletin board system (BBS). The seminal CBBS for instance was created on an S-100 machine with a Hayes internal modem, and a number of similar systems followed.
Later in the 1990s, software-based modems became available. These are essentially sound cards, and in fact a common design uses the AC'97 audio codec, which provides multichannel audio to a PC and includes three audio channels for modem signals.
The audio sent and received on the line by a modem of this type is generated and processed entirely in software, often in a device driver. There is little functional difference from the user's perspective, but this design reduces the cost of a modem by moving most of the processing power into inexpensive software instead of expensive hardware DSPs or discrete components.
Soft modems of both types either are internal cards or connect over external buses such as USB. They never utilize RS-232 because they require high bandwidth channels to the host computers to carry the raw audio signals generated (sent) or analyzed (received) by software.
Since the interface is not RS-232, there is no standard for communication with the device directly. Instead, soft modems come with drivers which create an emulated RS-232 port, which standard modem software (such as an operating system dialer application) can communicate with.
While traditionally a hardware device, fully software-based modems with the ability to be deployed in a cloud environment (such as Microsoft Azure or AWS) do exist.[44] Leveraging a Voice-over-IP (VoIP) connection through a SIP Trunk, the modulated audio samples are generated and sent over an IP network via RTP and an uncompressed audio codec (such as G.711 μ-law or a-law).
A null modem cable is a specially wired cable connected between the serial ports of two devices, with the transmit and receive lines reversed. It is used to connect two devices directly without a modem. The same software or hardware typically used with modems (such as Procomm or Minicom) could be used with this type of connection.
Serial device modes: If a dongle in permanently configured for serial mode, it is advised not to install usb-modeswitch onto your router device. Modem sticks are commonly equipped with a flash space containing drivers and software and/or provide a slot for a micro-SD-card. These features (like the 'NO-CD' feature) can be configured in various ways. These configurations may be stored permanently. In that case a modeswitch will behave in an unpredictable way.A modem stick, that was previously configured as a modem will show up as serial devices (typically /dev/ttyUSB0-2). A default setting in combination with modeswitch may additionally show the sd-card reader. See the Troubleshooting section in this document for further information. 2ff7e9595c
תגובות