DCE's CSU/DSU's NTE's and all that alphabet soup!

We have a load of data comms circuits in our office (in the UK)

We have a number of E1 lines and a few Frame Relay circuits for our WAN.

Due to the fact Cable and Wireless will no longer be supporting Frame we have moved to Global Crossing

An enigneer arrived today to install a CSU/DSU which was to be expected. However this device is plugged into a NTE (BritshTelecom box) was wondering what this does, if the csu/dsu provides all the clocking and coversion etc , why is this other "NTE" here? I suspect that this box terminates the ISDN 30 circuit we have in the building.. but can't be sure. And perhaps the Frame runs off this?

Confused!

thanks
dbranniganAsked:
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chicagoanCommented:
>And perhaps the Frame runs off this?
another circuit?

an NTE terminates an isdn line to interface with your customer premises equipment

http://www.bt.com/isdn/isdn30/installation/customer_interface.htm
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