She set the Raspberry Pi owner’s name to memory: Samir, retired telecom engineer. She’d send him a bottle of whiskey in the morning.
Desperation drove her to a subreddit for legacy VoIP. A user named sip_packet_surfer had posted three years ago: “PM me if you still need P0S3-08-12-00.zip.” cisco 7960 sip firmware download
Easy, except Cisco had long since buried the 7960 SIP files behind a support contract that no longer existed. The phone was end-of-life. The official FTP servers were ghost towns. She set the Raspberry Pi owner’s name to