A: Number of Ports in row (1). The first '1' is not explicitly defined in the provided selector. The first '0' indicates Standard/None Heat Sink. The second '1' indicates Standard Cage Plating. The second '0' indicates Standard/None Heat Sink Height. The '3' indicates the Plating for Mating Contact. The '000' are not explicitly defined in the provided selector. The 'T' indicates the Termination type, which is Surface Mount. Identifies the Amphenol QSFP-DD (Quad Small Form-factor Pluggable Double Density) connector series.