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SAM ATN ‐ Study for the Implementation of a New Digital Network in the SAM Region (REDDIG II) – Chapter 2 ‐ Appendix 2E
2.5 Analysis of test results in relation to current traffic:
Table 2E-2: SBBR-SAEZ AFTN peak hour traffic
2.5.1 Table 2E-2 presents the monthly traffic of messages between Brazil and Argentina
whose average numbers repeat themselves in the last 12 months.
2.5.2 An analysis of the maximum number of messages during peak hour (7/7/2009), which
was 318 messages, leads to the conclusion that a bandwidth of 4,8 kbit/s is reasonable for the
configuration of the AMHS circuit between Brazil and Argentina. Since the transmission between the
two countries currently accounts for the highest bandwidth utilisation for said application in the
REDDIG, it may be concluded that the rate of 4,8 kbit/s or 2,4 kbit/s could be used for all cases in the
SAM States.
2.5.3 However, Table 2E-3 summarises AFTN peak hour traffic between Brazil and
Atlanta, which has a maximum number of messages during peak hour (2/7/2009) of 1745 messages.
For that circuit, a rate of 9,6 kbit/s may be enough, but must be checked with continued testing of the
16-kbit/s and 9,6-kbit/s rates.
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