Information about DMT-2

DMT-2 is connected between PSTN and PBX using the E1/PRI interface. It routes mobile calls from PBX through mobile channels instead of going directly to the PSTN, hence reducing higher rate charges for mobile-to-fixed line calls. If the call is not a mobile call, it goes directly to the PSTN.

In the other direction, the calls coming from PSTN will be passed to the PBX. Thus the DMT-2 can perform the LCR (Least Cost Route) function.

The DMT-2 contains 2 E1/PRI interfaces and 31 mobile channels. One E1/PRI connects to PSTN while the other E1/PRI connects to PBX. The MCU of DMT-2 decodes the signal and retrieve the called number to determine whether this call should go through mobile channel or E1/PRI channel. There are 8 MTIC cards, and each MTIC card contains 4 mobile channels. The last port on the last MTIC card is spared for system use. Therefore, total number of mobile channels is 31 ports.

DMT-2 dimensions: 19" standard cabinet; Height 5U, Depth 42cm. 1U in the bottom of DMT-2 is MCU, The upper 4U consists of these PCB modules: 8 x MTIC,2 x E1 Trunk, 3 x Ctrl, IMS and Power.
 

GSM (1) GSM Frequency Quad band:900/1800/1900/850 MHZ: (2) GSM class: Small MS (3) Transmit power: Class 4(2W) for EGSM 900 (4) Class 1(1W) for GSM 1800 (5) SIM card reader :External - connected via interface connector (6) Antenna:50 Ohm antenna coaxial connector (7) Temperature range :Normal operation: -20℃ to +55℃ (8) Restricted operation: -25℃ to -20℃ and +55℃ to 70℃ (9) Storage:-40℃ to +85℃

CONTROL CARD (1) Providing Digital Tone Source required in the RACK. (2) ±15dB Gain Adjustment. IMS:512*512 Digital Switch POWER: (1) Input Voltage: AC90-135V, AC180-264V,5 0Hz~60Hz. (2) Input Current: 8A for 115VAC, 5A for 230VAC (3) Type:Switching. (4) Output:+3.3V_28A,+5V_30A,+12V_15A,-5V_0.5A,-12V_1A,+5VSB_2A. (5) Total Power: 300W