Menemukan Dua Kunci Telepon Plastik yang Diperkuat Serat

Telephone system: DTMF
Permintaan lampu sinyal dering panggilan masuk;
Ring pressure: ≥ 70dB(A);
Call connection time≤6S (non-blocking);
The maximum communication distance is 5km;
Classified rated sound pressure level intensity: ≥90dBA;
Rentang audio: 300Hz ~ 3400Hz;
Distorsi harmonik: ≤ 5%;
sistem panggilan DTMF;
Nilai tegangan umpan: DC48V/DC24V;
Sending/receiving frequency response: in line with GB/T15279-2002;
Transmit Loudness Rating (SLR): 5 ~ 15dB;
Peringkat Kenyaringan yang Diterima (RLR): -7 ~ 2dB;
Peringkat Sidetone Masking (STMR): ≥7dB;
The system has strong expansion compatibility and supports standard SIP 2.0 (RFC3261) and related RFC protocols;
Dukungan: TCP/UDP, HTTP, ARP/RARP, DNS, NTP, TFTP, TELNET;
Multiple voice coding methods such as G.729, G.723, G.711, G.722, G.726 are optional;
DTMF mode RFC2833, SIP INFO, INBAND;
Mendukung modifikasi alamat IP statis, resolusi nama domain DNS;
Support one-key direct call dispatcher function and SOS emergency call;
Provide alarm, monitoring, intercom, broadcast functions;
Fungsi interkom full-duplex;
Mengadopsi teknologi pembatalan gema canggih;
Speaker sensitivity can be adjusted;
Sistem ini menyediakan hasil perekaman dan perekaman, dan dapat memanggil dan menanyakan file rekaman kapan saja;
Can be set through WEB interface;
Online software update