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Applications
- ISP providing fractional E1/T1s to subscribers
- Data aggregating fractional E1/T1 data circuits
- Cellular extending fractional E1/T1 Ports from MTSO to
cell-sites
- DS-0 (64 Kbps) time-slot cross connect between E1 and T1
Ports.
- Interface conversion (only interface, frame and line-code
conversion) between E1 and T1 Ports
Highlights
- Stratum 3 clock
- Remote TCP/IP access for configuration and monitoring
- Text based user friendly CLI for easy configuration
- Telnet option
- Available in mixed 16 E1/T1Ports (8 E1 interfaces and 8 T1
interfaces) configuration
- Allows cross connect between E1 and T1 interfaces at DS-0
(64Kbps) time-slot level.
Features and Uses
- Provides DS0, "n"x64Kbps and fractional
aggregation between 8 E1 and 8 T1Ports
- Provides conversion between E1 and T1 interfaces
- Rear access
- User friendly CLI (text- based) commands
- Telnet (10/100 BaseT)
- Easy to install
- Configurable from 2 E1/T1 Ports to 8 E1/T1 Ports depending
on user requirements
- LED Indications on the front panel for alarms and status.
Benefits
- Reduce access costs by combining partially loaded E1/T1 s to
a single E1/T1
- Rear access wiring improves wiring and cable management
- Support Nx64kbps fractional E1/T1 operation and grooming
- Easy to install and simple to use.
VCL-MegaConnect Jr., 16 Port E1/T1 mixed configuration
DACS and interface converter
Shelf Description
2U high standalone system
The VCL-MegaConnect Jr., 16 Port E1/T1 mixed configuration
DACS and interface converter is a 2U,19 Inch Shelf, fitted with a backplane that provides
rear access of all external interfaces. The 2 Mbps (E1) Ports and the 1.5 Mbps (T1) Ports,
power input, alarm extension and the local configuration and management port are all
accessible from the rear/system backplane.
The 2 Mbps, 8E1 Interfaces are, 120 Ohms twisted pair RJ-45
connectors.
The 1.5 Mbps, 8T1 Interfaces are, 100 Ohms twisted pair RJ-45 connectors.
Alarm status, monitoring
- Loss of incoming signal at all E1/T1 Ports
- Configuration error alarm
In addition to the above monitoring facilities,
VCL-MegaConnect Jr., 16 Port E1/T1 mixed configuration DACS and interface converters is
provided with LEDs, which indicate various fault conditions.
Monitoring VCL-MegaConnect Jr., 16 Port E1/T1 mixed
configuration
DACS and interface converters via LED indications.
- 1 to 16 E1/T1 Ports LED indicators
- +3 V DC present (internal power supply)
- - 48V DC present (external power input)
- Configuration error
Application Diagrams
| E1 Interface - Technical Specifications |
| Line Rate |
E1 (2.048Mbps ± 50
bps) |
| Line Code |
HDB3 |
| Available Time Slots |
1 - 31 Data or 1 -
30 Voice |
| Voice Coding |
A Law |
| Signaling |
ITU-T, Q.421 and
Q.422 |
| Framing |
G.704 |
| Clock |
Internal, Loop timed |
| Electrical |
G.703 |
| Jitter |
G.823 |
| Impedance |
120 Ohms |
| Connectors |
RJ-45 (Female) |
| T1 Interface - Technical Specifications |
| Line Rate |
T1 (1.544Mbps ± 50
bps) |
| Line Code |
B8ZS, AMI,
(selectable) |
| Available Time Slots |
1 - 24 |
| Voice Coding |
Mu Law |
| Signaling |
D4 (Robbed Bit
Signaling), E&M Wink Start |
| Framing |
D4 |
| Clock |
Internal, Loop Timed
(from E1 clock) |
| Electrical |
Meets ITU-T and ANSI
T1 recommendations |
| Jitter |
ITU-T 1.431 |
| Impedance |
100 Ohms |
| Connectors |
RJ-45 (Female) |
| Mechanical Specifications |
| Rack Mounting |
Standard 19-inch DIN
rack |
| Height |
90mm (2U high) |
| Depth |
260mm |
| Width |
477mm |
| Power Supply |
| Input DC voltage |
-48V DC ( nominal ) |
| Range of input |
-40V to -60V DC |
| Output voltages |
+5V |
| Input Voltage
Reversal Protection |
Provided |
| Over Current
Protection |
Provided |
| Short Circuit
Protection |
Provided (recovers
automatically) |
| Under Voltage |
< 4.5V |
| Over Voltage |
5.4V to 5.6V |
| Efficiency at full
load |
>80% Typ. |
| Ripple at full load |
<5mVrms |
| Spike at full load |
<50mV |
| Power Consumption |
12W - 8 port, E1 to
T1 converter configuration
29W - 64 port, E1 to T1 converter configuration |
| Temperature |
0°C to 55°C |
| Humidity |
95% RH
(non-condensing) |
| Cooling |
Convection Cooling |
|
|
The VCL-MegaConnect Jr., 16 Port E1/T1 mixed
configuration DACS and interface converter occupies only a 2U high rack-space and is a
complete 19-inch stand-alone unit that provides connectivity of up to 16 E1/T1 Ports. The
unit operates on a - 48V DC input power-supply (AC input adapter is optional).