Cross connect between two serial interfaces

Dear All; My question could be easy but i don't know it's answer :)
(R1)S0/0----------S0/0(R3)S0/1-----------S0/0(R2) |
| -------------------------ppp------------------------- How can i cross
connect in R3 between S0/1 and S0/0 to run PPP between R1 and R2 on its serial
interfaces directly without involving R3 in any L3 ip addressing or routing
protocol, thanks

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Received on Sun Jun 19 2011 - 14:16:59 ART