SIP Trunk

Customer Case Studies

Business Services

What is a SIP Trunk? • SIP trunk is an IP based PSTN Trunk. This first step towards convergence in PSTN

telephony is going to change the landscape of voice communications in India.

• Unlike in traditional telephony, where bundles of physical wires are being delivered from

the service provider to a business, a SIP trunk allows a company to:

• Replace Multiple PRI lines with single physical link scaling from minimum 20 to

1500 voice channels.

• Easy maintenance and up-gradation

• Adopt future proof technology

Business Services

Effort BPO

Business Need

• Effort BPO needed a cost effective PSTN

access solution for their outbound

processes

• The last mile access solution also need to

be easily scalable with lesser complexity

and should meet the following challenges:

• High uptime and quick turn-around time

• Solution to be inter-operable with Genesys

predictive dialer

• Cost savings on Network Infrastructure

• Flexibility and scalability / Pay as you grow

Business Services

Effort BPO…contd

Solution by Tata Docomo

• SIP Trunk with 120 channels ensured easy scalability when required

• Requirement of 120 concurrent calls over PRI would have consumed 4 PRI port and

a new media gateway cost. This was saved through SIP trunk solution by providing

one physical link connected to single Ethernet port which is scalable from 20 to

1500 channels

• Genesys interoperability achieved by introducing “Asterisk” box which served the

purpose of registration with Tata Teleservices switch and sends direct SIP call

towards Genesys

• Due to lesser post dial delay, call maturity is faster on SIP Trunk compared to PRI

which makes SIP Trunk an ideal solution best suited for OBD purposes

Effort BPO in today’s scenario could fulfill the demand raised by their customers and

handle customer calls promptly with increased productivity of the existing call center.

• Need not maintain huge inventories which they have to in case of large number of

PRIs

• Enjoy ease of troubleshooting by virtue of IP Network

• Reduction in AMC/Data centre operation costs due to reduced hardware

• No dependency on hardware chassis for expansion planning as there is no available

slots needs to be checked which was in case of PRIs

The impact

Business Services

RST Infocom

Business Need

• Solution to carry out outbound voice campaign using

OBD (Out Bound Dialer) server

• PSTN (Public Switched Telephone Network) access

for domestic reach.

• Faster connectivity and higher ASR (Answer Seizure

Ratio) so as to deliver calls to target audience in a

given span

• Details of exact call failure reasons with disconnect

cause code for optimum use of OBD platform

• 900 PSTN channels

• CAPEX and OPEX savings on dialer platform

• Integration of PSTN access service with their

inhouse developed OBD platform

• High availability of the offered service

Business Services

RST Infocom…contd

• 900 hundred SIP channels distributed into 5 physical links of 180 channel each

(180*5) connected to 5 different OBD servers.

• Each SIP Trunk connected to an ethernet port at respective dialers with each having

2 ports, one for local LAN and other for housing Tata Docomo SIP Trunk

• RST can change 5 DIDs with each SIP Trunk; it gives the solution of handling

multiple OBD process with different CLIs from same dialer.

• The solution allows dynamic channel allocation to each display DID, by using 180

channel of SIP Trunk

• Single Physical link and hardware to scale up to 1500 channels

• Open standard codec support and technologies

• Investment protection and future proof technology

• Instant upgrade and low maintenance cost in servers, due to lower hardware

requirement

• One SIP Ethernet port is enough to cater approx one thousand concurrent call using

Fast Ethernet

• Interoperability with all IP-based applications

Solution by Tata Docomo

The impact

Business Services

VMC Technologies

SIP Trunk by Tata Docomo

• VMC Technologies was given 300 SIP

channels delivered on IP link.

• SIP Trunk ensured easy scalability when

required by VMC Technologies without any

more physical ports/ links required.

• Due to lesser post dial delay, call maturity was

faster on SIP Trunk compared to PRI which

increased the efficiency of dialer.

The Benefits

• Increased dialer efficiency made it ideal

solution for OBD process.

• No more dependency on chassis based up-

gradation on hardware, reduction in AMC/Data

centre operation costs.

• Open standard SIP Codec gives good ROI,

higher productivity, and flexibility to add more

channels on the same Ethernet port.

Moving to SIP Trunk, with 100

channels at first, and then ramping

upto 300, was the most cost effective

move that we have made recently. It

has resulted in a saving of approx

50 lakhs for my company and has

given us greater flexibility in terms

of operations and scalability. To top

that, our experience with the Tata

Docomo team has been nothing short

of excellent. We get support and

quick turnaround from the team

even at odd hours. How many other

companies serving us could boast of

that? None.”

Mayank Awasthi,

Senior VP,

VMC Technologies

Business Services

Enterprise Communications provider

The customer and the business issues

An Integrated Cloud Communications Solutions provider based out of Bangalore

required:

• Telco services to be delivered to customer’s service delivery platform hosted at Data

center at Bangalore which can offer automated voice based services such as

• Integrated voice response used for survey, polling, opt-in feature etc

• Outbound promotional campaigns

• Announcement services for BCP, occasion wishes etc.

• PSTN access solution to be instantly operational and support easy upgrade

Solution by Tata Docomo

• Tata Docomo provided telemarketing SIP Trunk with 300 channels on a single physical interface

• SIP Trunk was integrated with customer’s open source dialer • Single Ethernet hand-off ensured that there are no multiple physical ports required at

CPE • It also ensured that there is one link to be used as cross-connect by data centre services

provider and customer had to pay for a single link (instead of 10 as in case of PRI).

The Impact

• SIP Trunk increased the campaign productivity with more number of calls push in a day

as compared to PRI due to lesser post dial delay feature

• Reduced CAPEX & OPEX through SIP Trunk as there is no PRI hardware

• Cost savings realized on cross-connects as there is now only one single cable

• Increase in productivity due to lesser post dial delay

Business Services

India’s leading integrated infrastructure finance

player The customer and the business issues

• The customer is India’s leading integrated infrastructure finance player providing end to

end infrastructure financing and project implementation services

• Customer required a provider to serve PSTN access for their office communication use

with integration with their existing Avaya voice infrastructure

Solution by Tata Docomo

• Tata Docomo provided Level DID SIP Trunk with 60 channels on a single physical

interface

• Tata Docomo’s SIP Trunk integrated with “Asterisk” open source PBX application which in-

turn is integrated with Avaya Session Manager over internal SIP

• Asterisk open source soft application installed on customer’s server grade hardware which

also ensured that there is no need for any PRI hardware on their existing G450 gateway

• Presence of Avaya Session Manager and SIP licenses with customer enabled free

integration with Asterisk & Avaya communication manager

The Impact

• No CAPEX & OPEX through SIP Trunk as no PRI gateway and hardware required

• Full utilization of procured Avaya Session Manager which enabled seamless

interoperability between SIP & H323 VOIP protocols

• Ease of Maintenance & Upgrade due to use of Asterisk open source application over

server grade hardware

• Enhanced redundancy as there is no dependency of PRI Gateway uptime

Business Services

Thank You

For further details, please contact us at

mktg@tatatel.co.in