GCK Service Pack 10 (GCK_SP10_HF4 v10.4) This release serves as an update to GCK Service Pack 10. GCK Service Pack 10 must be installed before applying this hotfix. Package Download link: https://ied-gck.s3.amazonaws.com/ServicePack10/GCK_SP10_HF4.gcz Detailed Description: vACS v3.4.7.0 GCK-253 vACS can hang a TEL annc for max time if the caller hangs up during the pre-annc chime.