- 4 audio outputs or inputs- 4 form A relay contacts- 4 contact closure inputs- 4 SIP indentities for registering to a VoIP telephone system- RJ-45 jack for network connection- Front panel activity LED- Provides audio for up to 40 Valcom one-way amplified speaker assemblies per zone- Output control contact closure provided during paging output- Contact closure or VOX operation of audio inputs- VM-186 RJ-45 connector provided for audio and relay interface- Page with music output music mutes during page- AUX