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Home › Use of redundant bits of ESF data stream to transport message-waiting signalling over FXO/FXS T-1 digital link

Use of redundant bits of ESF data stream to transport message-waiting signalling over FXO/FXS T-1 digital link

US Patent 5940408 · Granted Aug 17, 1999

Estimated economic value: $7,738,000 ⓘ

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