On outbound call getting Retransmission timeout

When i make an outbound call i got this after answer and got hangup,Also there is no audio on both sides

[Oct  9 15:15:42] WARNING[153464]: chan_sip.c:4151 retrans_pkt: Retransmission timeout reached on transmission sqfa8s03oRR9zqtti0XNPQ.. for seqno 2 (Critical Response) -- See https://wiki.asterisk.org/wiki/display/AST/SIP+Retransmissions
Packet timed out after 6399ms with no response
[Oct  9 15:15:42] WARNING[153464]: chan_sip.c:4175 retrans_pkt: Hanging up call sqfa8s03oRR9zqtti0XNPQ.. - no reply to our critical packet (see https://wiki.asterisk.org/wiki/display/AST/SIP+Retransmissions).

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