in 1995 i had a internet backbone connection with att or bell, it was t1 it cost me over 1000 dollars a month what was the bandwidth of this T1 connection
A T1 line in 1995 had a fixed, standardized bandwidth of:
πΉ 1.544 Mbps (megabits per second), symmetric
- 1.544 Mbps download
- 1.544 Mbps upload
That speed never varied β it was dedicated, always-on bandwidth.
π§ How that 1.544 Mbps was structured
A T1 is made up of 24 digital voice/data channels (DS0s):
- Each channel: 64 kbps
- 24 Γ 64 kbps = 1.536 Mbps
- The remaining ~8 kbps was used for framing/overhead, giving the total 1.544 Mbps
So:
- Raw line rate: 1.544 Mbps
- Usable payload: ~1.536 Mbps
π° Why it cost ~$1,000+/month
In 1995, that price made sense because:
- It was dedicated (not shared like cable/DSL)
- It had SLA guarantees (uptime, latency)
- It often included:
- CSU/DSU hardware
- Carrier-grade routing
- Priority backbone access via AT&T or Bell affiliates
- It was the standard for:
- ISPs
- Universities
- Radio stations
- Early data centers
- Businesses hosting servers (before colo was common)
π Perspective (then vs now)
Year$1,000/month bought you19951.544 Mbps dedicated T120261β5 Gbps fiber (β1000Γ faster)
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