Hi,
Its good that we are seeing the sessions created, however the SRX is reporting that no reply traffic is being received:
In: 192.168.1.13/56525 --> 192.168.7.173/5060;tcp, Conn Tag: 0x0, If: irb.2, Pkts: 2, Bytes: 104, Out: 192.168.7.173/5060 --> 192.168.1.13/56525;tcp, Conn Tag: 0x0, If: st0.0, Pkts: 0, Bytes: 0,
I will definitely check the ASA at this point.