I install asterisk from source on centos 6.5 (plain asterisk) and i already success to monitor one server.

This is the diagram of my LAB

softphone (4001)--------------------------> asterisk Server With FOP2 --------------------------------> softphone (4002)

This the config asterisk server fop2.cfg

fop2.cfg
group=All Buttons:SIP/5001,SIP/4001,SIP/4002,SIP/5002,SIP/6001,PARK/default,ZAP/g0
group=All Extensions:SIP/4001,SIP/4002,SIP/5001,SIP/5002,SIP/6001
group=All Trunks:ZAP/g0
group=LT4:SIP/4002,SIP/4001
group=LT5:SIP/5002,SIP/5002,SIP/5001,SIP/5001
group=LT6:SIP/6001
user=4001:4001:chat,spy:LT4
buttonfile=autobuttons.cfg

autobuttons.cfg
[SIP/4001]
type=extension
extension=4001
label=4001
context=from-internal

[SIP/4002]
type=extension
extension=4002
label=4002
mailbox=4002@default
context=from-internal

[SIP/5001]
type=extension
extension=5001
label=5001
mailbox=5001@default
context=from-internal

[SIP/5002]
type=extension
extension=5002
label=5002
mailbox=5002@default
context=from-internal

[SIP/6001]
type=extension
extension=6001
label=6001
mailbox=6001@default
context=from-internal

My Question, how about if i want to monitor "Server Asterisk II) from FOP Server asterisk I ?, what parameter i should change on config fop2.cfg on Server Asterisk I?

softphone (4001) <----------------------> FOP2 Server asterisk I <---------> Server Asterisk II ------------------> softphone (5001)

Thanks