The PT-90 1004 is a network-type communication device for small and medium-sized businesses that can connect to IP phones, video phones, fax machines, and computer software phone systems. It provides enterprise users with cost-effective IP communication solutions that provide integrated IP audio and video communication, conference calls, and call recording.

The PT-90 1004 consists of a host and an expansion board. Each expansion board supports up to 200 IP phones and 100 SIP trunks, making it easy for users to upgrade the system. It can also be used to bridge IP voice traffic on different IP network segments to achieve interworking between IP traffic.