VOIC OVER IP- SIP （Optional）
Connection type: RJ45 Socket inside sealed enclosure
Call set-up Protocol: Session Initiation Protocol(SIP)
Configuration: DHCP or STATIC IP address provisioning
Main technical indexes:
1. Applicable for various types of SPC exchange and dispatching exchange system with feeding voltage of 33-60V.
high frequency group: 1209, 1336, 1477Hz, frequency deviation: -1.5%~+1.5%
If service line is a 3Km signal - level:
Standard frequency: low frequency group: -12dB~-6dB, high frequency group: -10dB~-4dB, level difference between low and high frequency of compound signal: 1dB~3dB, the total distortion caused by intermodulation of harmonic wave is
5. Call transmission index: (5KM)SLR<12, RLR<-1, STMR>10, output impedance is 600 Ohm.