MT-350 Operation Manual 16
A : Yes, it could, yet is confined to dial out by PSTN only.
Q11: Can the phone make inspection on the echo signal of polarity reversal?
A : Yes, it could. When call is dialed out through GSM, the phone will make linear
polarity reversal when it’s called for echo response.
Q12: Does the machine deserve CLID function?
A : Yes, it does. When GSM sends in call signal, it will send the CLID out from
phone by DTMF signal.
Q13: How to compulsorily dial out any number through GSM (VPN)?
A : We can press ’*’ before dialing out, and dial phone number next to it. Finally,
press ‘#’ to finish this task.
16 Specification
(1) Phone impedance: under DC 1kΩ, AC 600Ω (exclude wire impedance).
(2) Phone signal receiving level: -3dbm
～
-24dbm.
(3) Phone signal time: 50
～
100ms.
(4) Phone frequency error: ±1
％
.
(5) Feed voltage: 48V.
(6) Power converter: Input:230VAC 50Hz 200mA
，
Output:12VDC,1000mA
(7) GSM specification:
(7.1)GSM Frequency bands: Dual Band EGSM 900 and GSM 1800(GSM Phase 2+)
(7.2)GSM class: Small MS
(7.3)Transmit power:
Class 4(2W) for EGSM 900
Class 1(1W) for GSM 1800
(7.4)SIM card reader: External – connected via interface connector
(7.5)Antenna: 50Ωantenna coaxial connector
(7.6)Temperature range:
