Applications: STM-1 (optical / electrical) with upto 63 E1s with
E3, DS3, 10/100BaseT Ethernet interfaces


The VCL100MC-1 STM-1 (upto 63 E1) with E3, DS3, 10/100BaseT Ethernet interfaces is a compact, modular, and cost effective STM-1 SDH multiplexer equipment designed to manage bandwidth and provide E1 or fractional E1, voice and data access service over STM Networks. The STM-1 offers both electrical STM-1 (1+1) and optical STM-1 (1+1) interfaces. It is customized for the traffic demands, in the access network, typical of residential or business customers. The product supports end-to-end provisioning and management of services across all the segments of the optical network. It combines innovative optical networking software with the intelligence of SONET/SDH to deliver a flexible, cost-effective network solution.

VCL100MC-1 (upto 63 E1) with E3, DS3, 10/100BaseT Ethernet interfaces is a 3U height multi-card chassis system that provides flexibility to the customers in terms of expansion to support additional client interfaces by adding new modules in the field.

The system has two STM-1 optical / electrical interfaces in the aggregate side and allows for upto 3 tributary add-on cards. The following tributaries are available as add-on cards for the chassis:

  • E1
  • E3/DS3 tributaries (software configurable as E3 or DS3)
  • 10/100Base-T Ethernet (IEEE 802.3)
  • STM-1o
  • STM-1e/140Mbps tributary interfaces (software configurable).

The STM-1 / STM-4 can be managed through an integrated NMS that manages all the equipment, providing customers with end-to-end provisioning from a single platform for multiple service types - from E1/DS1s, E3/DS3s, E4/STM-1e, STM-1o and 10/100Mbps Ethernet services.

Additionally it provides a single 10/100Base-T Ethernet port, which can be mapped to one VC-12 bandwidth towards the aggregate side. This feature does not use any tributary slot and hence can supplement E1/DS1/E3/DS3 customers requiring a single Ethernet interface. This Ethernet interface on the base card is optional.

STM-1 Add-Drop Multiplexer: VCL100MC-1 Applications (upto 63 E1)

This configuration is used whenever VCL100MC-1 is part of a ring or a linear chain. The box will be configured with two STM-1 optical interfaces (East and West) with E1 drop interfaces. VC-3 and VC-12 level path protection can be offered using SNCP.

Terminal Multiplexer Applications

STM-1 Terminal Multiplexer

In a terminal multiplexer configuration, only one STM-1 optical interface is used in an unprotected set up. This is the case when VCL100MC-1 is either used as a spur or at the end of a linear segment. If 1+1 MSP is also provisioned, an additional STM-1 optical interface is required on VCL100MC-1.

Applications: Un-protected and Redundancy Options

STM-1 Regenerator

VCL100MC-1 can be configured as regenerator for STM-1 interfaces without using any tributary slots. The receive clock shall be used in the transmit direction.

STM-1 Regenerator

Network Applications

STM-1 Rings with E1/E3 traffic

STM-1 Rings with E1/E3 traffic

Transparent LAN service

The VCL100MC-1 ETC card is transparent to all higher layer protocols and provides point-to-point connections between remote Ethernet segments. The ETC is well suited for LAN interconnection services among geographically dispersed corporate offices. Typical LAN interconnection solutions use expensive ATM interfaces on routers to connect to SDH multiplexers. But the 10/100 Base-T interfaces on the VCL100MC-1 SDH node provide a much more cost-effective solution.

Conventional Solution using ATM interfaces on Routers

Consider connecting 8 subscribers requesting bandwidth of 6 Mbps each. Each router need 8 E3 interfaces for transporting this traffic and this necessitates an STM-4 Backbone.

Conventional Solution using ATM interfaces on Routers

VCL100MC-1 ETC Solution

In the VCL100MC-1 based solution the traffic from each of these Ethernet connections can be collected using a 10/100Base-T interface on the routers and SDH nodes. The VCL100MC-1 SDH node requires an 10/100Base-T ETC card and the traffic from these 8 different connections is flexibly mapped, requiring only an STM-1 Backbone. In addition, upgrading from the existing bandwidth is software -selectable resulting in cost saving in terms of interface cards and operational expenses.

Valiant Solution with 10/100Base-T interface on the routers and SDH nodes

Integrated Voice and Data Network

In a typical Interconnect Service voice and data traffic from multiple corporate offices need to be interconnected in a cost effective manner. A conventional solution uses separate voice and data networks to carry this traffic over separate fibers. Using the VCL100MC-1 multi-service platform, which provides both TDM and Ethernet interfaces through the ETC, a service provider can carry both voice and data over the same fiber pair using the same equipment.

Example: There is a need to provide data connectivity of 10 Mbps between two locations. There is also a voice traffic requirement of 21E1s between the same two locations. Consider two different distances between the two locations: 10 km and 50 km.

Conventional Ethernet + SDH solution

In this scenario, data and voice are carried over different fiber pairs using Gigabit Ethernet (GigE) for data and conventional SDH for voice (Figure 1). GigE LX/HX solution can drive only up to 10 km. GigE ZX solution can provide 70 km spans but is expensive.

Conventional Ethernet + SDH solution

VCL100MC-1 ETC solution

In this solution, data and voice are carried over the same fiber pair by mapping the 10/100Base-T Ethernet traffic onto SDH. The network is a linear SDH network, which can be optionally configured for 1+1 protection. Longer distances can be achieved by using long haul lasers that are relatively much more cost-effective.

Valiant Solution 10/100Base-T Ethernet traffic onto SDH

Related Links

Data Sheet stm-1, 63E1 MTBF and Budgets stm-1, 63E1 Technical Specifications System Hardware Applications Comparison Network Element Software