Q504 is the update SIP door phone of Q502, with up to fully waterproof feature. It can be easily deployed into IP telecommunication system, which is more and more popular over the world. With this door phone, people inside can talk with visitor and open door with their phones. With the IP66 waterproof feature, this door phone can be installed outside for the places where rain a lot.
Product Highlights:
A) Audio apartment VoIP door phone
B) Connect office phone system via SIP
C) Stainless case
D) Open the door
E) Fully waterproof feature
Features:
1) People in office can talk with vistor or door control
2) Connect office phone system via SIP
3) Stainless VoIP door phone
4) Full metal shell
5) Direct call to preset extension
6) Door access control
7) Adjustable speaker volume and microphone sensitivity
8) Doubles as a paging speaker
9) Auto-provisioning via FIP, TFTP
10) Web management
11) Peer-to-peer capable
Working system:
SIP door phone can be used Park, Apartment, Office etc to control the door access. It can be powered by PoE via RJ45 cable. All the Extensions(SIP Phones or Mobile Phones) and door phone register to the IP PBX. When the visitors press the door key, the door phone will call to a preset extension, people answering the call can open the door by entry an access code. Please check the following picture of the working system:
Audited Supplier 
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