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The state-of-art design provides the highest availability with the accurate timing signal
and data bit stream reconstruction. Predefined system parameter profiles that according to
different application requirement, ultimately simplify the installation process and saving
the maintenance cost.
Telecom and enterprise users can save a lot of access and equipment costs and generate new
revenue resources by offering different types of legacy services over Ethernet networks.
It is also suitable for connecting to the ethernet based wireless equipment to achieve
fast deployment of T1 services. One particular application is to provide a combination of
Ethernet and T1 services using low cost Wireless LAN bridges, or over RPR Ethernet rings.
Operators can use the 4 x VCL-T1 over Ethernet multiplexer to provide a provide a
combination of Ethernet and legacy T1 (TDM) services over wired or wireless packet
networks, or RPR rings.
TDM technology occupies fixed transmission
bandwidth which is suitable for real-time applications such as voice and video. Ethernet
technology is based on statistical multiplexing, transmitting and exchanging information
in packets. It does not take up a fixed transmission bandwidth, which is good for
achieving higher bandwidth utilization. But Ethernet technology does not provide adequate
QoS for real time applications.
The 4 x VCL-T1 over Ethernet can be used to emulate transparent T1channels over an
Ethernet link with an acceptable QoS (Please see the note: QOS, below), so that a majority
of the existing T1 based applications can be readily setup over Ethernet LANs and WANs.
(Note: QOS shall depend on the quality of the Ethernet link and packet losses)
Features:
- Four T1 ports supported, E1 or T1 easily selected by Web
Manager
- User-friendly Web server supported for easy setup and
maintenance
- Point to point and point to multi-point application
supported
- Uplink ports : 1+1 backup supported
- Stable T1 clock recovery, low jitter and wander
- Low processing delay for T1 channels, high bandwidth usage
efficiency
- Resist to packet loss, with PCM frame synchronization
protection
- User definable encapsulation packet size for different
application
- Enough jitter buffer to resist packet delay variation (PDV)
- Local Ethernet port throughput limiting, assuring T1 QoS
- Local and remote T1 LOS and AIS and packet loss indication
for trouble-shooting and maintenance
- Support cascade concatenate for more than 4 T1 ports
Application: 4 x VCL-T1 over Ethernet is used to setup 1 to 4 clear T1 channels
over LAN or IP networks, as depicted in Fig. 1 and Fig 2.
Point to Point 4x VCL-T1 over
Ethernet Application Diagram (figure below)
Figure 1 - As Above: Point to
Multipoint 4x VCL-T1 over Ethernet Application Diagram
Point to Multipoint 4 x VCL-T1 over
Ethernet application (figure below)
Figure 2 - As Above: Point to
Multipoint 4 x VCL-T1 over Ethernet application
In the above figure, a pair of 4 x VCL-T1
over Ethernet multiplexers create clear T1 channels over the packet network, providing
connections between the PBX and telephone exchange, or other terminal devices. At the same
time, computers connect to each other through the local Ethernet ports on the 4 x VCL-T1
over Ethernet multiplexers.
This configuration guarantees that the T1 channels get higher priority over computer data
for maximum QoS.
The most widely used application of 4 x VCL-T1 over Ethernet multiplexers is to set up
point to point wireless T1 links using low cost wireless LAN bridges or Ethernet RPR fiber
links. 4 x VCL-T1 over Ethernet multiplexers can work with most LAN bridges available in
the market. It may be necessary to adjust different parameters such as packet size and
packet jitter absorption buffer size for best operation for different LAN bridges.
Product: VCL TDMoIP-EthMux x 4T1-xx
| User
Interfaces |
Ethernet Uplink Port |
Complies with IEE 802.3 |
| T1 Port(s) |
4 E1, or 4 T1 ports. Comply with ITU-T G.703 |
| User (Local) Data Port(s) |
2 x 10 / 100BaseT Ethernet Local User Data
ports. Comply with IEEE 802.3
10 / 100 Mbps auto-sensed. Full / Half duplex auto-sensed |
Configuration and
Monitoring:
HTTP Web Manager
SNMP
Power Supply Options:
| Power Supply options |
Supply |
-48 DC power supply option. |
| Consumption |
+<10W |
Environmental:
| Environmental |
Temperature |
0C 50C |
| Relative Humidity |
<90% (non-condensing) |
Mechanical:
| Dimension |
W x H x D (mm) |
440 x 44 x 320 |
Ordering Information:
| Model Number / Ordering
Code |
Description |
| VCL TDMoIP-EthMux x 4T1-DC |
2 Uplink Port (1+1), 4 T1, 2 user
data port |
Compliance and
Regulatory:
EMC FCC Part 15 Class 2
Operation ETS 300 019 Class 3.2
Storage ETS 300 019 Class 1.2
Transportation ETS 300 019 Class 2.3
CE |
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