Technical Specifiations : VCL-CB, E1 Channel Bank with answer supervision and voice activity detection (VAD) voice activated answer supervision

Technical Specifications: VCL-CB, Intelligent E1 Channel Bank with answer supervision and voice activated answer supervision to deliver voice over an end-to-end E1 (radio / fiber / HDSL) links.

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Technical Specifications:
VCL-CB-INT / VCL-CB-BR
Intelligent E1 Channel Banks

Valiant intelligent E1 Channel Banks, with answer supervision and voice activated answer supervision. PRI ISDN (Euro ISDN) also available as an optional extra.

The VCL-CB-INT offers Voice Activity Detection (VAD) voice activated "answer supervision" and "disconnect supervision" to connect VoIP (Voice over IP), Voice over Frame Relay and Voice over ATM networks to analog PSTN (POTS) lines that do not provide any type of answer supervision / battery reversal functions.

VCL-CB-BR provides provides answer supervision / battery reversal / polarity reversal support and is used in applications to deliver voice over an end-to-end E1 (radio / fiber / HDSL) links. Features include complete line protection against difficult field condition.

The interface to the analog PSTN (POTS*) lines have been ruggedized to provide complete protection against line card failures which occur from induced voltages from AC power lines and lightening strikes and difficult field conditions.

Other Products

VCL-CB, E1 Channel Bank - Product Photo Analog Interfaces available:

FXO interface cards - connect to the analog PSTN (telco) lines.
FXS interface cards - connect to analog telephone sets.
E&M interface cards - connect to E&M switches / interfaces.

Digital Interface 2.048 Mbps, E1 Interface

Number of E1 Interfaces	1
Conformity (Electrical)	G. 703
Frame Structure	As per ITU (CCITT) G.704
Signaling	R2 Digital (Channel Associated Signaling in accordance with ITU-I Q.421 / Q.422 Rec). Optional: PRI ISDN (Q.931) Euro ISDN Signaling
PCM Sampling Rate	8000 samples/sec
Encoding Law	A Law as per ITU (CCITT) G.823
Bit Rate	2048 Kbps ą 50 ppm
Code	HDB3
Nominal impedance	120 W balanced (75 W unbalanced - option on request)
Connector	RJ-45 (120 ohms impendence)
Peak Voltage of a mark For 120 W Balanced interface 75 W Unbalanced interface	3.0 V ą 0.3 V 2.37 V ą 0.237 (Optional)
Peak Voltage of a space For 120 W Balanced interface 75 W Unbalanced interface	0Vą 0.3V 0Vą 0.237 V
Nominal Pulse Width	244ns
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	6dB at 1 MHz
Return Loss at: 51.2 Khz to 102.4 KHz 102.4 Khz to 2048 Khz 2048KHz to 3072KHz	>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 multi frame alignment: As per clause 5.2 of ITU (CCITT) G.732

2 Wire , Analog PSTN Interface - POTS Interface

Maximum Number of Channels	30
Transmission performance	Fully compliant to ITU (CCITT) G.712 specifications
Line Impedance	600W (900W optional)
Connector	RJ-11
Voice Channel Frequency	300Hz-3400Hz
Insertion Loss	-2dB Nominal (User adjustable range of -2dB to -7dB)
Idle Channel Noise	Ł-65dB
Return Loss	300 Hz - 600Hz -ł12dB 600Hz - 3400Hz - ł15 dB
Longitudinal Balance	ł 46dB between 300Hz to 3400Hz
Ring frequency detection	25Hz and 20 Hz
Ring voltage detection	ł30 volts RMS
Overload Level	+3.14 dBm ą 0.5 dBm
Data Transmission	Supports V.34 modems 33.6Kbps (download data transmission rate)

Clock Synchronization

Synchronization Sources	Internal Clock or timing derived From the E1 HDB3 link (Loop-Timed)
External Clock Input	As per ITU (CCITT) Rec G.703
Default Option	Internal Clock

Power Supply

Input DC voltage	-48V DC (nominal)
Range of Input	-40V to -60V DC
Input Voltage Reversal Protection	Provided

Environmental

Cooling	Natural, Convection cooling
Temperature	0°C to 50°C, Ambient

Mechanical Specification

Rack Mounting	Standard 19 inch DIN rack
Height	3U (133.33 mm)
Depth	260 mm
Width	477 mm
Weight	7.50 Kgs.

Notes:

FXO interface cards - connect to the analog PSTN (telco) lines.
FXS interface cards - connect to analog telephone sets.
E&M interface cards - connect to E&M switches / interfaces.