Why asterisk auto generate 183 without sdp to calling party

hi, I use asterisk-13.26 version. the called party send 183 with sdp, it will be forward to calling party. but chan_pjsip will auto generate 183 without sdp. how to make these 183 must have a sdp body to calling party. by the way, I set endpoint with ignore_183_without_sdp=yes

I’d suggest providing the complete configuration, the SIP trace, and state whether you are using bundled PJSIP or not.

I used 13.21 with a bundled PJSIP and not 13.26 version

this is endpoint configure:

ParameterName                      : ParameterValue
 =========================================================
 100rel                             : required
 accountcode                        :
 acl                                :
 aggregate_mwi                      : true
 allow                              : (alaw|ulaw|g729)
 allow_overlap                      : true
 allow_subscribe                    : true
 allow_transfer                     : true
 aors                               :
 asymmetric_rtp_codec               : false
 auth                               :
 bind_rtp_to_media_address          : false
 call_group                         :
 callerid                           : <unknown>
 callerid_privacy                   : allowed_not_screened
 callerid_tag                       :
 connected_line_method              : invite
 contact_acl                        :
 context                            : media-proxy
 cos_audio                          : 0
 cos_video                          : 0
 device_state_busy_at               : 0
 direct_media                       : false
 direct_media_glare_mitigation      : none
 direct_media_method                : invite
 disable_direct_media_on_nat        : false
 dtls_ca_file                       :
 dtls_ca_path                       :
 dtls_cert_file                     :
 dtls_cipher                        :
 dtls_fingerprint                   : SHA-256
 dtls_private_key                   :
 dtls_rekey                         : 0
 dtls_setup                         : active
 dtls_verify                        : No
 dtmf_mode                          : rfc4733
 fax_detect                         : false
 fax_detect_timeout                 : 0
 force_avp                          : false
 force_rport                        : true
 from_domain                        :
 from_user                          :
 g726_non_standard                  : false
 ice_support                        : false
 identify_by                        : header
 inband_progress                    : false
 incoming_mwi_mailbox               :
 language                           :
 mailboxes                          :
 media_address                      :
 media_encryption                   : no
 media_encryption_optimistic        : false
 media_use_received_transport       : false
 message_context                    :
 moh_suggest                        : default
 mwi_from_user                      :
 mwi_subscribe_replaces_unsolicited : false
 named_call_group                   :
 named_pickup_group                 :
 notify_early_inuse_ringing         : false
 one_touch_recording                : false
 outbound_auth                      :
 outbound_proxy                     :
 pickup_group                       :
 record_off_feature                 : automixmon
 record_on_feature                  : automixmon
 refer_blind_progress               : true
 rewrite_contact                    : false
 rpid_immediate                     : false
 rtcp_mux                           : false
 rtp_engine                         : asterisk
 rtp_ipv6                           : false
 rtp_keepalive                      : 60
 rtp_symmetric                      : true
 rtp_timeout                        : 60
 rtp_timeout_hold                   : 60
 sdp_owner                          : -
 sdp_session                        : TINET
 send_diversion                     : true
 send_pai                           : false
 send_rpid                          : false
 set_var                            :
 srtp_tag_32                        : false
 sub_min_expiry                     : 0
 subscribe_context                  :
 t38_udptl                          : false
 t38_udptl_ec                       : none
 t38_udptl_ipv6                     : false
 t38_udptl_maxdatagram              : 0
 t38_udptl_nat                      : false
 timers                             : yes
 timers_min_se                      : 90
 timers_sess_expires                : 1800
 tone_zone                          :
 tos_audio                          : 0
 tos_video                          : 0
 transport                          : transport-udp-nat
 trust_id_inbound                   : false
 trust_id_outbound                  : false
 use_avpf                           : false
 use_ptime                          : false
 user_eq_phone                      : false
 voicemail_extension                :