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sequence count field (SC)

The sequence number field (SC) is in the protocol data unit ( PDU) of the segmentation and reunification sublayer ( SAR) depending on the type of ATM Adaption Layer ( AAL). For AAL type 1 it is a 3 bits long data field, for AAL type 3/4 it is a 4 bits long data field, which is used for sequence integrity control. Each SAR PDU is assigned a consecutive sequence number, modulo 8 in AAL-1 and modulo 16 in AAL-3/4.

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Englisch: sequence count field - SC
Updated at: 03.03.2008
#Words: 68
Links: sequence number (SEQ), field, protocol, data, unit (U)
Translations: DE
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