src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/SIPRequestHeaderProvider.java
@@ -194,7 +194,7 @@ request = sipFactory.createMessageFactory().createRequest(requestURI, Request.SUBSCRIBE, callIdHeader, cSeqHeader, fromHeader, toHeader, viaHeaders, maxForwards); Address concatAddress = sipFactory.createAddressFactory().createAddress(sipFactory.createAddressFactory().createSipURI(sipConfig.getSipId(), sipConfig.getSipIp()+":"+sipConfig.getSipPort())); request.addHeader(sipFactory.createHeaderFactory().createContactHeader(concatAddress));