A New Special-Purpose IP Telephone System[J]. Journal of Transport Information and Safety, 2002, 20(4): 42-45. doi: 10.3963/j.issn.1674-4861.2002.04.013
Citation:
A New Special-Purpose IP Telephone System[J]. Journal of Transport Information and Safety, 2002, 20(4): 42-45. doi: 10.3963/j.issn.1674-4861.2002.04.013
A New Special-Purpose IP Telephone System[J]. Journal of Transport Information and Safety, 2002, 20(4): 42-45. doi: 10.3963/j.issn.1674-4861.2002.04.013
Citation:
A New Special-Purpose IP Telephone System[J]. Journal of Transport Information and Safety, 2002, 20(4): 42-45. doi: 10.3963/j.issn.1674-4861.2002.04.013