[Asterisk-video] Is it possible to pass through two asterisk ?

[오상수]

Hello all 
I would like to study asterisk video call
But I'm beginner in asterisk
Is it possible to pass through two asterisk ? 
Sip Phone--> [asterisk1] --Zap ----- E1 ------ Zap --[asterisk2] --> Sip Phone
Between Asterisk1 and Asterisk2 is connected by E1(PRI)
For Video Call, libh324m & amr codec is installed
If it is possible, how to configure extension.conf
Best regards
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