[Freeswitch-users] Limiting call length

We're working on the billing solution for fs (astpp) fastpp? And need some input on what is the best way to limit call length. In asterisk we've been using L(x[:y][:z]) option to Dial. Whats the recommended route for this in fs? Does something like this exist? If not, can I add this to the "if I were at cluecon, i'd wish" list ... and what would the bounty be? -- wasim h. baig | principal consultant | convergence pk | +92 300 8508070