Chan_Sip Peers Problems: High ping (outgoing call)

Hi everyone, please help me for this issue :frowning:

I created a trunk between freepbx(1) and freepbx(2), then freepbx(2) called out.
When <10 ext makes a call, everything is ok. However, when we make >10 ext, for example, 25 ext, we call out at the same time. Status of SIP Peers in freepbx(1) is too high (ping 400–1000) and there is no call signal

Why does it happened, can any one help me this. Please :frowning: