diff --git a/channels/chan_sip.c b/channels/chan_sip.c index 5f422d72a3b35655ea2fa52a3892aba7f7480039..2c44208b46cae87393aa11e8c148cb45e5ff2fd7 100644 --- a/channels/chan_sip.c +++ b/channels/chan_sip.c @@ -8595,7 +8595,9 @@ static struct ast_frame *sip_read(struct ast_channel *ast) sip_pvt_lock(p); fr = sip_rtp_read(ast, p, &faxdetected); - p->lastrtprx = time(NULL); + if (fr && fr->frametype != AST_FRAME_NULL) { + p->lastrtprx = time(NULL); + } /* If we detect a CNG tone and fax detection is enabled then send us off to the fax extension */ if (faxdetected && ast_test_flag(&p->flags[1], SIP_PAGE2_FAX_DETECT_CNG)) {