Abstract: A method of transmitting DTMF signals over a compressed computer network (24) comprises sending a packet containing a compressed DTMF signal followed by a confirmation packet. The confirmation packet preferably comprises an uncompressed DTMF signal which is transmitted on the same logical channel as the packets that represent voice signals. To detect the DTMF signal transmitted, a telephony Internet server (28) decompresses packets as they are received. If a packet appears to contain a compressed DTMF signal, the telephony Internet server looks for the presence of the confirmation packet before processing the previously received packet as a DTMF signal. In an alternative embodiment, the confirmation packet comprises a code that represents a DTMF signal. The packets that represent the voice signal and the code representing the DTMF signal are sent on separate virtual channels of the same logical channel.

Abstract: A telecommunication system includes a private branch exchange (170) that uses an automatic route selection algorithm to select a trunk on which a call is to be routed. A number of trunk groups are queried for an available trunk and once an available trunk is located, the call is placed. The automatic route selection algorithm monitors the call to determine if an error message or error tone is received. If an error message or error tone is received, a set of remaining trunk groups not previously queried are queried for an available trunk to route the call.

Abstract: A method of transmitting DTMF signals over a compressed computer network comprises sending a packet containing a compressed DTMF signal followed by a confirmation packet. The confirmation packet preferably comprises an uncompressed DTMF signal. To detect the DTMF signal transmitted, a telephony Internet server decompresses packets as they are received. If a packet appears to contain a compressed DTMF signal, the telephony Internet server looks for the presence of the confirmation packet before processing the previously received packet as a DTMF signal. In another embodiment, an output of a speech compressor and a DTMF signal detector are transmitted on separate virtual channels of a real time protocol data stream.

Abstract: A telecommunication system includes a private branch exchange (170) that uses an automatic route selection algorithm to select a trunk on which a call is to be routed. A number of trunk groups are queried for an available trunk and once an available trunk is located, the call is placed. The automatic route selection algorithm monitors the call to determine if an error message or error tone is received. If an error message or error tone is received, a set of remaining trunk groups not previously queried are queried for an available trunk to route the call.

Abstract: A method of transmitting DTMF signals over a compressed computer network (24) comprises sending a packet containing a compressed DTMF signal followed by a confirmation packet. The confirmation packet preferably comprises an uncompressed DTMF signal which is transmitted on the same logical channel as the packets that represent voice signals. To detect the DTMF signal transmitted, a telephony Internet server (28) decompresses packets as they are received. If a packet appears to contain a compressed DTMF signal, the telephony Internet server looks for the presence of the confirmation packet before processing the previously received packet as a DTMF signal. In an alternative embodiment, the confirmation packet comprises a code that represents a DTMF signal. The packets that represent the voice signal and the code representing the DTMF signal are sent on separate virtual channels of the same logical channel.

Abstract: Methods and apparatus are described for facilitating multiple data communications with a first platform (100, 102, and 104) using a single communication conduit (108) having first and second channels. First data are transmitted between the first platform and a second platform (114) via the first and second channels (202). It is determined whether an incoming call comprises second data of a particular type (206). Where the incoming call comprises the second data of the particular type (208), transmission of the first data via the second channel is inhibited (226) thereby enabling reception of the second data by the first platform via the second channel while the first data continue to be transmitted via the first channel. The second data are then received at the first platform via the second channel (230). Transmission of the first data via the first and second channels is resumed in response to termination of transmission of the second data (266).