Post #2027498
2025-09-18 16:50 UTC
@leymoo @Theresacityinmymind
There were many purpose-built phone line patch units; you would need to isolate the studio mixer from the telco -48v and avoid hum. A transformer (and not much more) could do the job.
Telco certified ones were expensive, even for a single line. Even today:
https://www.bhphotovideo.com/c/buy/Telephone-Audio-Interfaces/ci/8815
Replies (1)
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@dec23k@mastodon.ie 2025-09-18 16:52
@leymoo @Theresacityinmymind I can remember reading about some UK radio stations using a "Buzby box" (named after BT's annoying publicity mascot) to simulate phone calls. A staffer could "phone in" using a regular mic, with the box providing just the right EQ and distortion.