Focusrite ISA 828 User Manual page 15

Recording with Inserts
Focusrite Compounders (Stereo Compression) x 4
Analogue I/Ps
ISA 828 has all eight Insert switches engaged
Digital Storage Medium
Recording from AES Outputs 1-8 to Pro Tools HD™ at 192kHz
AES/EBU 25-pin Inputs
(requires 2 cards)
Cable pinout according
to Appendix 1
Analogue O/Ps
Pro Tools HD™ 192 Interface
Word Clock Output (1x or 256x)
ISA 828 Digital Card in 2-wire mode
(Jumpers in default 'enabled' position)
15
x8