Part number A9K-dual-rate exists for 24xPorts , otherwise there in an option of Flexible Consumption Model for A99
A9K-24X10GE-1G-TR | ASR9000 24-port dual-rate 10G/1G packet transport–optimized line card |
A99-48X10GE-1G-SE | ASR9000 48-port dual-rate 10G/1G service edge line card |
A99-48X10GE-1G-TR | ASR9000 48-port dual-rate 10G/1G packet transport line card |
Best regards,