T1/E1 Fundamentals

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n this presentation we dig down deep and find out how T1/E1 works at the signal level. We will cover frequencies and speeds, how data is framed and error checked, how digital and analog channel signaling is carried, and how timing is propagated and recovered in the system. This will be a live demonstration using various mechanisms in DAHDI to explore these topics.
Russ Meyerriecks, Lead Developer for DAHDI project, Digium

[@deanvm9158]

I was trying to learn the basics of E1 and T1 and I thought Fundamentals meant BASIC. I was wrong. LOL.

[@antonfernando8409]

how best to handle when receiving a yellow alarm over e1 ? thanks for any suggestion.

[@cliffa.6809]

the E1 stream is encoded as it as it is multiplexed upstream (and decoded downstream) .. OOVs and BOOVs ring a bell ? there is a need to avoid tramsmitting long streams of " nulls"

[@entertainandknowleage1711]

Hello Support, i have problem with port E1 card

[@LINESTELECOMCORDEDTELEPHONES]

Good video

[@roy5721]

My nose bleeds

[@cliffa.6809]

your negative comment regarding government monopolies of telecommunication infrastructure is unfounded. When a national network becomes commercially segmented, end users have no control of the path there service takes as it transits one company to another. The risk of co-location of essential services increases dramatically when national networks are sold off. Moreover, the more companies that a services transits increases the the likeliehood that downtime will occur without liability to damages incurred . ( because each company is only legally bound to provide 98% up time) .. eg a service that transits 10 X telco companies each having 98% up time will result in < 80% up time .

[@markomus1]

Disagree. The government and the companies--both of them--are ever only as good as the people who run them. There's nothing inherently better or worse to being public domain or private. HOWEVER, it should be pointed out that competition is ALWAYS a good option, so breaking up a monopoly is never a bad idea. Breaking up an effective monopoly isn't too far from a bad idea, either, if that effective monopoly is being run by corrupt leadership.

[@stizandelasage]

Don't do anything to me I taught myself