Which type of cable comes from TELCO ?
ulviallahverdi
Member Posts: 6 ■□□□□□□□□□
in CCNA & CCENT
Hello everyone, I have problem with understading of cable type of Telco.
In Cisco book (ICND 1,100-105) talks about Leased-Line Cabling. And book says that:
......The serial cable connects to the router serial interface to the external CSU/DSU. "The four-wire cable from the telco plugs in to the CSU/DSU, typically using RJ-48 connector that has the same size and shape as an RJ-45 connector."
Please tell me , four-wire cable comes to customer from TELCO? Is it genius. Customer just use only 4 wire cable?
Is it right? Or instead which type of cable comes from Telco to customers, I was thinking that it is serial, but serial is using only for between CSU/DSU and Router?
And my second question is what is data port that is a big one?. Look at this pic pls.
In Cisco book (ICND 1,100-105) talks about Leased-Line Cabling. And book says that:
......The serial cable connects to the router serial interface to the external CSU/DSU. "The four-wire cable from the telco plugs in to the CSU/DSU, typically using RJ-48 connector that has the same size and shape as an RJ-45 connector."
Please tell me , four-wire cable comes to customer from TELCO? Is it genius. Customer just use only 4 wire cable?
Is it right? Or instead which type of cable comes from Telco to customers, I was thinking that it is serial, but serial is using only for between CSU/DSU and Router?
And my second question is what is data port that is a big one?. Look at this pic pls.
Comments
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rob42
Member Posts: 423
The leased line service delivers bits in both directions at a predetermined speed, using full-duplex logic. It only needs four wires; one pair for each direction, in the same way as an Ethernet cable only needs two pair of wires for full-duplex.
Nice to see the equipment. I’m student and as such I’ve not had the opportunity to see this type of equipment yet.No longer an active member