J.O. Emagbetere  , F.O. Edeko  , 
    An Evaluation of Outgoing Calls Quality of Gsm Network Services in Oghara, Delta State,
    Research Journal of Applied Sciences,
    Volume 2,Issue 10,
    2007,
    Pages 1016-1018,
    ISSN 1815-932x,
    rjasci.2007.1016.1018,
    (https://makhillpublications.co/view-article.php?doi=rjasci.2007.1016.1018)
    Abstract: This study is aimed at presenting a report on the quality of services provided by GSM operators in a typical village in the southern part of Nigeria. This is expressed in terms of the ability to establish and maintain call connections; intra and inter network calls, for outgoing calls in Oghara, Delta State of Nigeria. Test points within the service area were randomly selected and in each of these locations, series of measurement were made. Three GSM operators were investigated in the area for a period of eleven months and these operators are discussed in this study as Operators A, B and C. The accessibility levels expressed in percentage shows that for intra and inter- network calls, the Operators C network had better call quality of service with an overall assessment of 71.52 and 65.75%, respectively in Oghara for the period investigated.
    Keywords: Evaluation;outgoing calls;quality;network services;Delta State