The string refers to a virtual machine disk image for Nokia SR OS (Service Router Operating System).
This specific image is a legacy version (13.0.R4) of the Nokia 7750 SR-OS. It is designed to run in a virtualized environment like , EVE-NG , or KVM/QEMU . It allows you to simulate high-end edge routing features without needing physical 7750 hardware. Key Performance & Tech Specs Platform: Simulated Nokia 7750 Service Router. Format: QCOW2 (standard for QEMU/KVM hypervisors). Timos-sr-13.0.r4-vm.qcow2