Какой стек протоколов PPP/TCP/IP был использован? Ping был исходящий (например на Yandex) или входящий? UDP/TCP - это странная связка. Можно попробовать спросить время по протоколу NTP используя UPD пакет у любого из сайтов:
//The table below lists the time servers used by the NIST Internet Time Service (ITS). //The table lists each server's name, IP address, and location. Please note that while we make //every effort to ensure that the names of the servers are correct, we control the names of only //the nist.gov servers. If you have difficulty using the name of a system, you can access a server //using the IP address directly. // //Whether you connect to a server using the name or the IP address, it is a bad practice to ”hard-code” //a particular server name or address into a device so that these parameters cannot be changed by the end user //if that becomes necessary at some future time. // //All users should ensure that their software NEVER queries a server more frequently than once every 4 seconds. //Systems that exceed this rate will be refused service. In extreme cases, systems that exceed this limit may be //considered as attempting a denial-of-service attack. // //Name IP Address Location //time-a.nist.gov 129.6.15.28 NIST, Gaithersburg, Maryland //time-b.nist.gov 129.6.15.29 NIST, Gaithersburg, Maryland //time-a.timefreq.bldrdoc.gov 132.163.4.101 NIST, Boulder, Colorado //time-b.timefreq.bldrdoc.gov 132.163.4.102 NIST, Boulder, Colorado //time-c.timefreq.bldrdoc.gov 132.163.4.103 NIST, Boulder, Colorado //utcnist.colorado.edu 128.138.140.44 University of Colorado, Boulder //time.nist.gov 192.43.244.18 NCAR, Boulder, Colorado //time-nw.nist.gov 131.107.1.10 Microsoft, Redmond, Washington //nist1.symmetricom.com 69.25.96.13 Symmetricom, San Jose, California //nist1-dc.WiTime.net 206.246.118.250 WiTime, Virginia //nist1-ny.WiTime.net 208.184.49.9 WiTime, New York City //nist1-sj.WiTime.net 64.125.78.85 WiTime, San Jose, California //nist1.aol-ca.symmetricom.com 207.200.81.113 Summetricom, AOL facility, Sunnyvale, California //nist1.aol-va.symmetricom.com 64.236.96.53 Symmetricom, AOL facility, Virginia //nist1.columbiacountyga.gov 68.216.79.113 Columbia County, Georgia //nist.expertsmi.com 69.222.103.98 Monroe, Michigan
Подробнее опишите ваш эксперимент. Я работаю с модемом MC35i.
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