| 摘要 |
2079340 9214320 PCTABS00014 A multi-channel telephonic communications system, (PBXA-PBXD), where voice, data, facsimile information is packetized and switched to the desired destination based upon a call number embedded in each packet which is based upon the digits dialed at the source. Aswitching architecture (44) is used to minimize the trunk line resource needed and to simplify system configuration and maintenance. Connection between the source and the desired destination are allowed if there is sufficient bandwidth to support the connection. Flow control is also provided, which dynamically varies the bandwidth provided. Flow control is also provided, which dynamically varies the bandwidth used by voice packets to adjust to changing traffic levels. Voice bandwidth is reduced when needed by the traffic volume, and voice bandwidth is increased when possible to improve voice quality.
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