Hybrid gateways built-in H.323 and SIP protocols. The lines can be configured into different numbers or used for TGW. Highly reliable line detection prevents the line hanging death in the largest tent. It can forward outside Caller ID Number under the SIP protocol, which is an important function of PBX application. Super Echo Cancellation Algorithm and Balanced Circuit make line echo minimum. Low price, Stable and performance are pronoun of the HTM series products，it is the first choice of PXS Manufacturers, Call Center and System Integrators.