uhf tacsat /dama multi-service tactics, techniques ... - UHF-Satcom.com

. Voice.
(1) Bandwidth (25-kHz or 5-kHz).
(2) Mode (DAMA or dedicated).
(3) Data rate (2.4-kbps or 16-kbps).
(4) Criteria.
(a) Per the JCS, narrowband voice mandate, compatibility with advanced
narrowband digital voice terminal (ANDVT) application 3 using voice digitization at 2.4kbps
is the joint standard for secure voice operations via UHF satellites.
(b) For a number of high priority networks, the COCOM can designate that
a network operate at 16-kbps for technical or voice recognition requirements.
c. Data.
(1) Bandwidth (25-kHz or 5-kHz).
(2) Mode (DAMA or dedicated).
(3) Data Rate (75-bps to 64-kbps).
(a) The major factors that determine data rate selection are the file size
required to be transmitted, the volume of traffic, and tolerance for delay in access to the
circuit.
(b) Larger file sizes require greater throughput speed (for example, a file
size of 50-bytes may be transmitted over a 300-baud link, but a 1.2-megabyte file may
require a nine.6-kbps link).
d. Duty cycle. (For what percentage of a 24-hour day is access to the circuit
required?)
(1) Low—1 to 2 hours access per 24-hour period.
(2) Medium—2 to 8 hours access per 24-hour period.
(3) High—8 hours or more access per 24-hour period.
e. Access period. Coordinated universal time date-time group of start access date
and stop access date with specific periods of use per day (for example, 0700Z to 1700z
daily). Request 24-hour access if mission analysis identifies the requirement.
f. Traffic priority. CJCSI 6250.01A identifies a prioritization scheme to determine
access to both the core warfighting and enterprise-wide SATCOM resource
apportionment. See Appendix J for the prioritization scheme used to determine access.
g. Mission rationale (for specific/special resource request).
(1) Equipment, platforms, or mission capabilities/limitations (such as not
capable of operating in all modes or bandwidths).
(2) Support relationships (special users, coalition users).
(3) Geographic or physical location (DAMA MHOP), footprint, look angle
constraints.
II-2