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Client's Quote :

"Eurus was everything that we had hoped for. In fact we have found in them, a perfect partner that goes to any extent to help build our business, often going way beyond what was expected or contracted for."

Mr. Sanjiv Bhavnani
CEO & M.D.

VoFR - Services

Eurus offers you high quality unified pay per use Service, where we provide the client with end to end solution. Our VOFR enable customer to use end to end variable IPLC, TDM voice and US site MUX on a per minutes usage.

  • Eurus VOFR Network

    Of the three popular packet/cell technologies (Frame Relay, IP and ATM), Frame Relay is the most widely deployed. Frame Relay is commonly used in corporate data networks due to its flexible bandwidth, widespread accessibility, support of a diverse traffic mix and technological maturity.

    Frame Relay service is based on Permanent Virtual Connections (PVCs). Frame Relay is the most appropriate technology for the Call Centre / BPO industry as it combines highly efficient bandwidth utilization with predictable performance.

    Voice Frame Relay access devices (VFRADs), such as Nortel Passport series and Nuera Orca GX and F series integrate voice into the data network, and the Predictive Dialer / PBX / ACD at each site in the BPO network to the Frame Relay network running over dedicated IPLCs.

    All VFRADs, such as Nortel Passport series and Nuera GX and F series employ sophisticated techniques to overcome the limitations of transporting voice over the Frame Relay network without the need to add costly bandwidth.These techniques are discussed below for Frame Relay. Implementation for IP and ATM is discussed in the Voice over IP (VoIP) and Voice over ATM (VoATM) sections, respectively.


In-bound Services by Eurus

  • Toll Free
    Eurus's Inbound Toll-Free Services go way beyond simply picking up the tab for customer calls. They're also an invaluable tool for customer service and marketing efforts. Eurus also provides interactive tools that allow you to manage toll-free networks with incredible precision - helping you complete more calls and giving you control over how they're processed. You'll benefit from one cost-efficient calling plan for both domestic and international services, covering dedicated and switched, and inbound and outbound traffic, all with industry-leading reliability and a broad spectrum of advanced features.
    Ideal for headquarters, larger offices, call centers and other locations with a high volume of long distance calls. This service works on high-speed dedicated T1 access facilities connected directly to the Eurus Network. Our Toll-Free Advanced Features can be added to any of our toll-free services to provide announcements, routing, transfer and control features designed to your specifications. You can customize your toll-free service to best meet the needs of your business and the customers calling you.
  • US DID
    DID is a service offered by telephone companies that enables callers to dial directly to an extension on a Private Branch Exchange (PBX) or packet voice system without the assistance of an operator or automated call attendant. This service makes use of DID trunks, which forward only the last three to five digits of  a phone number to the PBX or router/gateway. If for example, a company has phones extensions 555-1000 to 555-1999 and a caller dials 555-1234, the local central office (CO) would forward 234 to the PBX or packet voice system. The PBX or packet voice system (Cisco CallManager and IOS router/gateway) would then ring extension 234.
  • UFIN
    With our Universal International Free phone Number (UIFN) you can make inbound toll free calls outside of the Native country and extended call coverage areas. Once an ITFS or UIFN call connects to a domestic carrier network, it is directed to a corresponding 8XX number and then terminated domestically. ITFS calls can be originated from more than 20 international locations, with each country utilizing its own international individual toll free number. With UIFN, customer in the native country use a single toll free number for call origination.
    A single toll free number for over 35 countries. That’s what Eurus  Universal International Free-Phone Number (UIFN) delivers. Reduce costs and market just one toll free number internationally, for greater brand recognition. Our ITFS and UIFN offer both switched and dedicated access. Some of its benefits are:
    • A single number from your choice of over 35 countries, with landline, mobile and payphone access
    • Customer owned number, allowing for UIFN portability
    • Competitive pricing with no monthly fee or call set-up charges
    • Flexible technical solutions including ANI, CLID and OLI
    • Available via TDM or VoIP.


Out-bound Services by Eurus

  • TDM Switching Capacity
    Time Division Multiplexing (TDM) switching enables service providers to cap their investments in legacy technology, providing a way to use legacy services and new services simultaneously. It is an integral part of Cisco AS5000 Series Gateways in general and Cisco ASAP architecture in particular, a scenario that service providers can exploit to their advantage. The major applications and benefits of TDM switching include:
    • TDM switching can be used to protect the investments already made in the legacy technology/equipment while enabling the new investments in the technology for new services. The legacy systems can continue to be used transparently by using the PRI/channel-associated signaling (CAS). Results in new revenue from PRI offload
    • Offers cost savings from migration to SS7
    • Enables seamless migration to new services
    • Available in all Cisco AS5000 Series Gateways and all trunk interfaces (T1/E1/DS3)
    • Offers TDM switching between SS7, PRI and CAS calls
    • Use of external test equipment-TDM switching can be used to connect to test tone-generating devices needed to meet service providers' provisioning or homologation requirements. Connecting to external test equipment by using TDM switching as depicted in Figure 5 can provide Type 105 test tones in the Cisco AS5000 Series Gateways
    • Lower interconnect costs with SS7-IMT trunks are typically 40 to 70 percent cheaper than PRI trunks. Customers can migrate to SS7, directly connected to the Cisco gateway and continue receiving benefits from their legacy systems.
  • Multiple DS3 connectivity on TDM
  • Multiple Carrier-Teleglobe, Primus, Verizon, Pointone etc to Newyork & LA
  • T1 port for Nuera, Nortel Passport and Cisco
  • Voice traffic over TDM based Tier 1 network with strategic agreement with largest long distance services providers and delivering
  • Outbound  Voice minutes.

Technical Benefits of VOFR:

  • Prioritization
    The VFRADs' prioritization schemes "tag" different applications according to their sensitivity to delay, assigning higher priority to voice and other time-sensitive data. The VFRADs let the higher priority voice packets go first, keeping the data packets waiting. This has no negative effect on data traffic, as voice transmissions are relatively short and, being compressed, require very little bandwidth. They can therefore slip into the data network alongside the heavy graphics, payroll information, e-mail and other data traffic without perceptibly encumbering overall network performance.
  • Fragmentation
    VFRADs incorporate fragmentation schemes to improve performance. Data packets are divided into small fragments, allowing higher priority voice packets to receive the right-of-way without waiting for the end of long data transmissions. The remaining data packets in the data stream are momentarily halted until the voice transmission gets through.
  • Controlling Variable Delay
    Variation in the arrival times between packets, also called jitter, causes unnatural-sounding voice instead of a smooth voice stream. If a packet does not arrive in time to fit into the voice stream, the previous packet is replayed. This can seriously detract from voice quality. To avoid the effect of jitter, VFRADs detain each packet in a jitter buffer, giving subsequent packets time to arrive and still fit into a natural voice flow. Since the jitter buffer adds to the overall delay of voice transmissions, the optimal jitter buffer should fit the network's differential delay. Today’s VFRADs employ adaptive jitter buffering, which continuously monitors the network delay and adjusts the queuing period accordingly.
  • Voice compression
    Voice compression allows the packet switching network to most effectively carry voice sessions without compromising voice quality. Low bit-rate voice compression algorithms such as ITU G.729A permit the greatest number of simultaneous multiple calls while maintaining high quality voice. Vendors such as Nortel and Nuera which have implemented voice compression algorithms in their Frame Relay access devices, can offer greater bandwidth savings, reduced network congestion, and high quality voice transmissions.
  • Silence Suppression
    In a telephone conversation, only about 50% of the full duplex connection is used at any given time. This is because, generally, only one person talks while the other person listens. In addition, voice packets are not sent during interword pauses and natural pauses in the conversation, reducing the required bandwidth by another 10%. Silence suppression frees this 60% of bandwidth on the full duplex link for other voice or data transmissions.
  • Echo Cancellation
    Echo cancellation improves the quality of voice transmissions. It eliminates the echo that results from the reflection of the telephony signal back to the caller, which can occur in a 4-wire to 2-wire hybrid connection between the VFRAD and the telephones or PBX. The longer it takes the signals to return to the caller, the more perceptible the echo.
  • End to End Support.

Cost Benefits of VOFR:

  • VOFR significantly reduces toll and leased-line costs by making use of excess frame relay bandwidth and allowing customer to use unified service on a pay-per use model
  • Reduces costs & delays in implementing voice infrastructure changes
  • VOFR is fast & its variable packet sizes can introduce latency that can affect voice traffic
  • End to end infrastructure is managed by the eurus.

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