All official cables (except for the HDMI cable) connect to the Xbox 360's AV connector and are compatible with all Xbox 360 models. Analog stereo audio is output by these cables by RCA connectors, with the exception of the "Advanced SCART AV Cable", where it is delivered via the SCART connector's audio pins. With the exception of the "VGA HD AV Cable" cable and "HDMI Audio Adapter", all cables are also capable of outputting SD video at 480i/60 Hz ("NTSC" or "PAL60", depending on console region) and 576i/50 Hz ("PAL"; only available on PAL region consoles). A TOSLINK optical S/PDIF connector was integrated into the AV connector (console side) of many pre-2010 (grey) Xbox 360 AV cables, allowing output of "stereo LPCM", "Dolby Digital 5.1" and "Dolby Digital with WMA Pro" audio. These do not feature on current AV cables. All official AV-based cables (except the "HDMI Audio Adapter") physically block the HDMI port when plugged into equipped models; on pre-2010 (grey) cables this is due to the size of the connector, while 2010 (black) cables feature a plastic tab for this purpose.