Fire Alarm Splice

[mvsubstation]

I am replacing an existing fire alarm panel with a new fire alarm panel and want to extend the existing fire alarm circuits to the new panel location. Is it acceptable to splice the existing fire alarm circuits? I vaguely recall somehwere that splicing fire alarm cable is not allowed but cannot find the code reference.
thanks.

 

[cdafd]

have seen it done normally they gut the old box and use it as a junction box. I think the rule is if you splice you must use a junction box.

 

[cdafd]

nfpa 72 says to meet nec 70