As opposed to E1 links in Europe. Same same until you want to patch a US T1 to a European E1. Some sweet hardware money was made dealing with that. ( different framing, 2mbit/s instead of 1.44, 56kbps splits vs 64kbps splits. Clocks are a nightmare.
Story is that Bell tested the T1 in comms pits around Murray Hill NJ and when it worked for a long city block between two manholes they knew they had a product they could sell.
Watched a telco guy fix a broke E1 by sending one of the pairs a bit further round the krone frame to separate the signals better. I've even seen them add more wire to try and dampen down some local noise or reflectance or harmonics or something.
The old E1/T1 lines were sometimes pressurised and came with fancy brass taps to let the water out with its own teeny weeny bucket hanging off the tap. I kid you not.
ggm•1h ago
Story is that Bell tested the T1 in comms pits around Murray Hill NJ and when it worked for a long city block between two manholes they knew they had a product they could sell.
Watched a telco guy fix a broke E1 by sending one of the pairs a bit further round the krone frame to separate the signals better. I've even seen them add more wire to try and dampen down some local noise or reflectance or harmonics or something.
The old E1/T1 lines were sometimes pressurised and came with fancy brass taps to let the water out with its own teeny weeny bucket hanging off the tap. I kid you not.