E1/T1 Mux with OFDM-Backhauls (60 Mbps)

I have another problem with understanding the using of the T1/E1-Multiplexers.

Three agencies of banks want to communicate (data and telephony)
with each other. We need a very secure link. So we use Greengate-
Router with VPN-tunneling and AES. Furthermore we have in each agency a T1/E1-Connection, that we have to connect with the Canopy-System.

Do I use for this the Multiplexer?? If yes, how many do I need?
They are packed for 2! But for my understanding, I need a multiplexer
in each agency. So, I only need three. Is it right??

For better understanding, see the following draft!


Thank you for helping me!!

Kind regards Daniel

http://www4.ntplus.de/aktion/data/pmr/canopy/pic_sparkasse.bmp

ddombrock@ntplus.de wrote:

Do I use for this the Multiplexer?? If yes, how many do I need?
They are packed for 2! But for my understanding, I need a multiplexer
in each agency. So, I only need three. Is it right??


IMHO, you need a pair per link

regards,
mrdlnf