Technical Specifications: Bhumika presents a breakthrough in technology by integrating the WAN T1 interface to the GSM mobile communications network with 24, GSM (mobile) wireless links for mobile communications with an integrated T1 Interface


T1 GSM Gateways Technical Specifications

	T1 GSM Gateways
	T1 GSM Gateways Ordering Information Product Brochure (PDF) PowerPoint Presentation
	PRI ISDN 30 SIMs GSM Gateways PRI ISDN 90 SIMs GSM Gateways E1 GSM Gateways E1-90 GSM Gateways T1 GSM Gateways T1-72 GSM Gateways
	Other Products
	Multiplexers STM-1 / STM-4 SDH Multiplexers TDM (E1 / T1) over IP / Ethernet E1 & T1 GSM Gateways Channel Banks Voice Compression - DCME Echo Cancellers Voice over IP (VoIP) - AudioCodes T1 <> E1 Converter E1 / T1 WAN Routers
	Test Instruments
	Precision Power Analyzers Optical / Laser Power Meters Digital Multimeters GPIB / PXI Controllers Clamp Meters Insulation Resistance Testers Thermometers

T1 Interface Card | Power Supply Card
GSM Access Card | Echo Canceller Card

T1 Interface Card

Number of T1 Interfaces One

Conformity

G.703

Frame Structure D4

PCM Sampling Rate 8000 samples / second.

Encoding Law Mu Law

Bit Rate 1544Kbps 50ppm.

Code AMI, B8ZS - Selectable

Nominal Impedance 100 Ohms Standard
(75 Ohms Optional)

Connector RJ45 (100 Ohms Impedance)

Peak Voltage of a mark
For 100 Ohms Balanced Interface
3.0 Volt 0.3 Volt.

Pulse Mask As per ITU-T (CCITT) Rec. G.703

Output Jitter <0.05UI (in the frequency range of 20Hz to 100KHz).

Permissible Attenuation 6dB at 1MHz

Return Loss at:
51.2 KHz to 102.4 KHz.
102.4 KHz to 2048 KHz
2048 KHz to 3072 KHz
> 12dB
> 18dB
> 14dB

Jitter Tolerance As per ITU-T (CCITT) G.823

Loss and Recovery of Frame Alignment As per Clause 3 of ITU-T (CCITT) G.732

Loss and Recovery of Multi-Frame Alignment As per Clause 5.2 of ITU-T (CCITT) G.732

Power Supply Card

Input DC voltage -48V DC ( nominal )

Range of input -40V to -60V DC

Output voltages +5V

Full Load Output Current 18A@5VDC

Input Voltage Reversal Protection Provided in the Card

Over Current Protection 20A for +5V

Short Circuit Protection Current limit - 20A. Recovers on removal of short

Under Voltage < 4.5V

Over Voltage 5.4V to 5.6V

Efficiency at full load >80%

Ripple at full load <5mVrms

Spike at full load <50mV

Power Consumption 120 Watts (Worst Case)

GSM Access Card

Number of GSM Interfaces 1 ~ 24 (Stackable, 1 thru 24).

Type 1. Dual Band EGSM 900 MHz and EGSM 1800 MHz.
2. Dual Band EGSM 900 MHz and EGSM 1900 MHz.(Optional)

Compliance Compliant with ETSI GSM
Phase 2+ standard (Normal MS)
Class 4 (2W @ 900MHz)
Class 1 (1W @ 1800 MHz / 1900 MHz (Optional))

Approvals Fully Type Approved to GSM Standards

SIM Interface Internal Tray Toolkit Class 2. 3V Reader

Voice Features Full Rate, Enhanced Full Rate And Half-Rate (FR/EFR/HR)

DTMF Dual Tone Multi FrequencyFunction (DTMF)
Dialing Support

Alarms

An alarm shall be displayed in LED L1 / L2 for the following reasons

Invalid SIM Card
Unregistered SIM Card
Faulty SIM Card
Faulty GSM Module
GSM Access Card Out of Range

Echo Canceller Card

Provides voice echo cancellation of up to 64ms / 128ms

Conforms to ITU-T G.165 and ITU-T G.168

G.164 /G.165 disable tone detection

Non-Linear Processor with Comfort Noise Insertion

Narrow-Band Detector

Eliminates long echo tail.

T1 Echo Canceller Card - T1 Interface (Optional)

Number of Interfaces	2, 1 - Input (RJ-45) 1 - Output (RJ-45)
Conformity	G.703
Frame Structure	As per ITU (CCITT) G.704
PCM Sampling Rate	8000 Samples / sec
Encoding Law	Mu Law as per ITU (CCITT) G.711
Bit Rate	1544 Kbps � 50 ppm
Code	HDB3
Nominal Impedance	100 W balanced
Peak Voltage of a mark For 100 W balanced interface	3.0 V � 0.3 V
Peak Voltage of a space For 100 W balanced interface	0 V � 0.3 V
Nominal Pulse Width	244 ns
Pulse Mask	as per ITU (CCITT) Rec. G.703
Output Jitter	< 0.05 UI (in the frequency range of 20Hz to 100 Khz)
Permissible Attenuation	6 dB at 1 MHz
Return Loss at: 51.2 KHz to 102.4 Khz 102.4 KHz to 2048KHz 2048KHz to 3072 Khz	> 12dB > 18dB > 14dB
Jitter Tolerance	As per ITU (CCITT) G.823
Loss and recovery of frame alignment	As per clause 3 of ITU (CCITT) G.732
Loss and recovery of multiframe alignment	As per clause 5.2 of ITU (CCITT) G.732

Mechanical Specifications

Rack Mounting	Standard 19-Inch DIN Rack
Height	6U (265 mm)
Depth	290 mm
Width	19-inch (477mm)
Weight	10.5Kgs. (Net)