All, I have shared line working properly when dialing an extension directly, even if there are multiple registered extensions. The remaining problem is when group calling shared line does not functioning. Any recommendations to address this? Internal profile <param name="manage-presence" value="true"/> <param name="manage-shared-appearance" value="true"/> <param name="presence-hosts" value="$${domain},$${internal_sip_ip},$${external_sip_ip}"/> <param name="force-register-domain" value="$${domain}"/> <param name="force-register-db-domain" value="$${domain}"/>