Prowid course material: https://kurslar.prowid.com/en/index.php?id=lesson&m=3010
ISDN: BRI and PRI, Q.921 and Q.931 · BRI (BRA)
The S0 bus: four wires, 192 kbit/s, up to 8 terminals
🔒 This is the beginning of the lesson. The full lesson is available with a subscription.
