As existing network synchronization levels already exceed those required for national security emergency preparedness, no action need be taken to increase the robustness of network synchronization beyond existing standards for normal network operation; designers of terminal devices should engineer them to operate satisfactorily under system synchronization standards.

NOTES

1.  

Briefing material on file with the Committee on Review of Switching, Synchronization and Network Control in National Security Telecommunications.

2.  

Time and Frequency Dissemination Services. 1979. NBS Special Publication 432. Washington, D.C.: U.S. Department of Commerce.

3.  

Lindsay, W.C., and A.V.Kantak. 1980. Network synchronization of random signals. IEEE Transactions on Communications COM-28 (8 August): 1260– 1266.

4.  

Braun, W.B. 1980. Short-term frequency effects in networks of coupled oscillators. IEEE Transactions on Communications COM-28 (8 August): 1269– 1275.

5.  

Mitra, D. 1980. Network synchronization: Analysis of a hybrid of master-slave and mutual synchronization. IEEE Transactions on Communications COM-28 (8 August): 1245–1259.

6.  

Jordan, E.C., ed. 1985. Reference Data for Engineers, 7th ed. New York: H. W.Sams & Co.

7.  

Davies, K. 1966. Ionsopheric Radio Propagation. NBS Monograph 80. Washington, D.C.: National Bureau of Standards.

8.  

Munter, E.A. 1980. Synchronized clock for the DMS-100 family. IEEE Transactions on Communications COM-28 (8 August): 1276–1284.

9.  

Bell Communications Research, Incorporated. 1986. Digital Synchronization Network Plan. Technical Advisory TA-NPL-000436. Livingston, N.J.: Bell Communications Research, Incorporated.

10.  

American National Standards Institute. 1987. ANSI T1.101–1987: Synchronous Interfaces for Digital Networks. New York: American National Standards Institute.

11.  

U.S. Naval Observatory (private communication). 1988.

12.  

Information provided by expert committee members.

13.  

Beser, J., and B.W.Parkinson. 1982. The application of NAVSTAR differential GPS in the civilian community. Navigation 29(Summer).



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