'VCL-E1oP' E1 over Packet (2 E1 Port GE Version) TDM
over IP equipment supports transmission of up to 2 x E1 links over IP
/ Ethernet, MEF or MPLS networks.
The 'VCL-E1oP' E1 over Packet (2 E1 Port GE Version)
TDM over IP equipment, equipped with a powerful PowerPC 400 MHz Processor which
provides a highly reliable clock recovery mechanism for low jitter and
wander control, even under variable network conditions.
2 x E1 Port
E1oP (E1 over Packet) TDM over IP equipment provides 2 x GigE
electrical ports along with 2 x Gigabit optical ports which allow the
Users to implement 1+1 add-drop (Drop-Insert), Ethernet link redundancy
(Spanning Tree Protocol) and QoS by implementing Differentiated Services (Diffserv)
and packet priority classification protocols for network optimization.
(E1 over Packet (2 E1
Port FE Version) TDM over IP
equipment also optimizes on the network usage, such
that the bandwidth used by the E1oP equipment on the packet network is
limited to the corresponding to the number of E1 ports and the time-slots
that are being transported over the Ethernet / packet network.
Purpose of TDM over Packet technology
Telecom companies and enterprise
users can save significant network and equipment cost and generate
additional revenue by offering different types of services over a single
packet-switched infrastructure by the use of E1oP equipment. The E1oP
equipment is also suitable for connecting to Ethernet / packet wireless
equipment to achieve fast deployment of E1 services over wireless Ethernet
networks. One particular application is to build E1 links with low cost
Wireless LAN bridges, replacing expensive TDM / E1 microwave radios.
The 2 x E1 over Ethernet (VCL-E1oP)
multiplexer may be used to provide legacy TDM services over Ethernet
optical fiber, or wireless Ethernet/IP networks.
How the TDM over Packet (2 E1 Port GE Version)
The E1 data streams received on the
E1 interfaces are converted by the E1oP engine of the E1oP equipment
to Ethernet data packets (of a fixed size) and transported over the
Ethernet network with UDP / IP, MEF or MPLS headers. At the receiving end
the E1oP reconstructs the original data streams by removing the IP, MEF
or MPLS headers and converts the Ethernet data packets back to E1 frames
using highly reliable and accurate clock recovery mechanism. The 'VCL-E1oP'
(2 E1 Port GE Version) offers the user a choice of standard, E1 to packet
and packet to E1 conversion mechanisms that include SAToP and CESoPSN
19-Inch rack mountable
1U form factor (44mm)
1+1 Redundant Power Supplies, AC
and DC, or AC plus DC.
Redundant power supply inputs.
Extended Temperature Range: (-200C
EMI / EMC Complaint
Real Time battery backed clock
with life in excess of 10 Years
E1 Clock recovery and
Adaptive Clock Recovery (ACLK)
Recovered Clock (RCLK) /
Asymmetrical (One-Clock and
Synchronization to an External
Synchronization to an Internal
Automatic clock priority
selection with fall back
Key Features - E1 and E1oP Interface
Supports 2 independent E1 interfaces.
Internal, External, Adaptive, Recovered
clock and Asymmetrical (One-Clock and Two-Clock) options for the E1 TDM
port synchronization. Automatic clock priority selection with fall back.
Absolute and Differential times tamps.
Jitter and Wander conforms to G.823 / G.824
and G.8261 and TDM specifications.
Supports three E1 framing modes - Framed,
Unframed and Multi-framed with CAS signaling.
Supports point-to-point, point-to-multipoint
and drop and insert applications.
Supports IETF-PWE3 (pseudo-wire), SAToP and
CESoPSN transport mechanisms.
Supports CESoPSN payload mechanism to
support the fractional E1 with data rate of 64Kbps to 2.048Mbps (DS0
timeslot level). User configurable data rate from 64kbps to 2048kbps, in
steps of 64kbps.
CESoPSN payload mechanism feature allows the
user to optimize the packet switched network by limiting its usage to
the corresponding number of timeslots carried by an E1 channel.
Supports SAToP payload mechanism to
transport full E1 (transparent to the structure of the TDM frame useful
for transporting framed / unframed E1 channels).
Supports network latency / packet delay
variation / jitter buffer of up to 512ms.
Supports IP, MPLS and MEF8 (Metro Ethernet)
RJ45 - 120 ohms balanced E1 interfaces.
Optional 75 Ohms BNC interface (120 Ohms to 75 Ohms interface converter
E1 Loopback facility for testing and
Key Features - Ethernet / IP Network Interface
Switching Capacity upto 6 Gbps, non-blocking
4 GigE Ports.
Optical SFP based (1000Base-FX) and
Electrical (10/100/1000Base-T) Ethernet Port options.
2 x 10/100/1000BaseT Copper Ports.
2 x 1000BaseFX Optical Fiber Ports.
Point-to-point and point-to-multipoint
applications based on IP addressing.
Supports drop and insert applications.
Port Control Ingress Rate Limiting.
1+1 Hitless Ethernet Link Redundancy Port Trunking.
Spanning Tree Protocol.
Supports QoS, 802.1p based packet priority.
Tagged/Un-Tagged/Un-Modified 802.1Q Mode.
User configurable MTU (E1oP payload)
packet size. May be configured from 1 to 1800 Bytes.
Switch supports jumbo frame sizes of up to
Port based and Tag based VLANs.
Single / Double 802.1 VLAN tagging (Q in Q
VLAN Tagging) user configurable.
Supports QoS on 802.1p based packet
Supports Packet priority assignment (IP
Diffserv / DSCP).
UDP-specific “Special” Ethernet type.
In band VCCV ARP.
System Management, Monitoring and Alarm
NMS (Network Management System) to monitor
multiple units from single Central Location.
External Alarm - Dry contact relay alarms
are also available at rear of the system to connect the system to an
Supports system temperature monitoring with
High Temperature and Low Temperature alarms and SNMP Traps.
Supports SNMP V2 Monitoring and Traps.
UDP-specific “Special” Ethernet type.
Self-test for checking system errors upon
Clock Performance Alarms.
Network Performance Alarms.
Network Performance Monitoring and
Online / remote upgrade of firmware.
OAM: Operation and Management Ports
System Access, Control and Management Options
CLI Control Interface (HyperTerminal or
SNMP V2 Traps (MIB File provided).
Windows based GUI (Graphical User Interface)
for easy configuration, management and access. Ability to monitor
multiple units from a single NMS.