The following case studies illustrate some of our success stories working with clients in either upgrading their voice network, cost-reducing their voice telecommunications expenses, or both.

Telecom Assessment Results - Non-Profit

In early 2015, an assessment of the telephony and broadband data access bills was performed for a non-profit organization located in Northern New Jersey. The organization's monthly costs for telecommunications is as follows:

  • Approximately $145 per month for broadband cable data access to the public Internet.
  • Approximately $760 per month for 17 lines of analog voice service from a competitive local exchange carrier. 15 analog lines are connected to a legacy TDM-based phone system and the other 2 lines service a building about 400 yards away from the main facility. There are approximately 35 phones in the organization that average 375 local calls totaling 1000 minutes and 200 long distance calls totaling 825 minutes on a monthly basis.
  • Approximately $35 per month for an analog line from a major carrier to service the elevator in the building.

The opportunity for cost savings is to convert the 17 lines of analog services for phones to a Session Initiation Protocol-based (SIP) trunking service from an Internet Telephony Service Provider (ITSP) or to subscribe to aSIP trunking service from the cable provider. Going with an ITSP provider would reduce the monthly voice costs from $760 per month to $30-50 per month for 10 concurrent connections, while SIP trunking from the cable company would reduce the monthly voice costs to $150 per month for 4 concurrent connections. An assessment of the broadband cable connection to support VoIP during the implementation phase will determine whether a cable SIP trunk (provides voice quality of service) or ITSP SIP trunk is used for public voice network connectivity. To summarize, moving away from analogue voice circuits to SIP trunking connectivity to the public voice network will reduce this non-profit's voice expenses by over $600 to $700 per month, or $7200-8400 annually.

If the decision is made to re-use the existing legacy voice system which only supports analog trunks, then an Adtran voice gateway can be programmed to convert the SIP trunk traffic from the ITSP or cable provider to analog trunks. Depending on the number of concurrent voice calls and the complexity of the existing voice system dialplan, this implementation is estimated to cost $1500-2500 for the Adtran gateway and labor. The non-profit organization would prefer to upgrade their existing voice system to a VoIP-based solution with the latest unified messaging and presence features.

This project is awaiting capital approval by the organization and is scheduled for implementation in the 2016 fiscal year.

Church Voice Deployment

This church was running a legacy Avaya Definity PBX with several phones andanalog trunks from the PBX to a major carrier. Internet was provided by a Digital Subscriber Loop (DSL) line with 768 Kbps downstream and 384 Kbps upstream of bandwidth and a separate voice line for fax. An analysis of their voice and data bill showed that there was a monthly average of 800 minutesused by incoming calls and 500 minutes used for outgoing calls. Many of the outgoing calls were intralata calls, which the carrier charged$0.05 cents per minute for each call.

The DSL data service was replaced with a fiber-to-the-premise offering from the carrier with 20 Mbps of downstream and 5 Mbps upstream of throughput. An open source router was connected to the optical network terminal that firewalls the church's private network from the Internet and prioritizes upstream voice traffic leaving the building. The church is now running SipXecs with Polycom phones in its offices and leverages the subscribe to presence capability that lets personnel see when others are on the phone. All incoming calls are answered by an auto-attendant, which frees up the office administrator to do other work. The fax machine is now being driven by a Grandstream FXS gateway connected to SipXecs. The voice and data network runs on a combined Power over Ethernet switch.

A SIP trunk provider was selected that offered a metered public voice connectivity for $5 per month with five concurrent calls, $0.009 per minute overage charge above 500 incoming minutes, and $0.019 overage per minute for outgoing minutes used above 100 minutes - anywhere across North America.

The church 's monthly telecommunications costs for voice and broadband services have been reduced by over 70 percent after these changes were implemented.

Financial Company Voice Deployment

Each employee in this company has a separate office and a reception area at the main entrance. The phones connected to the legacy ATT Partner PBX and told each employee who was on a phone line. Intercom was used extensively when incoming calls were answered by a shared main line and needed to be directed to another employee. The Partner PBX capability had to be duplicated in the new phone system. Analog lines from a major carrier was connected to the PBX for public voice network calls.

SipXecs was installed in the office with Polycom phones and expansion modules. The phones, voice server, and open source router were connected to a Power over Ethernet switch that is separate from the data network. The WAN interface of the open source router is connected to a separate Ethernet port on the cable modem router with a public IP address for voice that is different than the one used for Internet services. The router has been configured to prioritize voice traffic in the upstream direction.

Three appearances of the main line was programmed on each employee phone in SipXecs - this leverages the Polycom shared line capability (in SipXecs, this feature is called Bridged Line Appearance or BLA). Speed dials with subscribe to presence for the personal lines of each employee was also enabled in the speed dial list so that every employee could see who was on their personal line before using the intercom capability. The employees programmed remaining line keys on the Polycom phone and expansion chassis with external numbers of key contacts using the speed dial capability from the SipXecs user portal. Voicemail to email delivery was configured for each employee on the voice server.

A SIP trunk package with 10 concurrent connections was configured on the voice server. Network probes for the company's voice broadband connection and SipXecs server were built into the Louisa Voice monitoring tool, and automatic weekly backups of the company's SipXecs configuration to a Louisa Voice server was configured.

The company's monthly telecommunications costs for voice have been reduced by over 40 percent as a result of these changes. 

Medical Devices Company

This client was using hosted VoIP services from a national provider - the move to a new office provided them with an opportunity to re-evaluate their voice services. This firm already had a hardened IT server running multiple back office services on VMware.

SipXecs was installed as a virtualappliance on the company's IT server and Polycom VVX 400 color desktop phones were deployed on employee desks. Voice to email was enabled for every employee and one-touch transfer line keys were programmed on employee phones who answered incoming calls for the company. A SIP trunk to the public phone network with 10 concurrent connections was configured on SipXecs.  Monitoring of their broadband connection was enabled as well as automatic weekly backups.

This company's monthly expense for voice services has been reduced by 40 percent as a result of these changes.

Country Club Voice Deployment

The client's voice and data communications was serviced by a T1 line in a fractional fashion- .i.e. when there was no voice calls, all 23 channels would be available for data. When voice calls were active, the data throughput for Internet access would be reduced accordingly. The club was looking for ways to cost-reduce their monthly telecommunications costs while keeping their legacy PBX for a few more years.

Internet service from the local cable provider was ordered which delivered 35 Mbps downstream and 5 Mbps upstream of broadband data access throughput. The cable modem was front-ended by an open source NAT router which firewalled the country club's private network from the public Internet.

In parallel, an Adtran IP Business Telephony gateway was configured so that the IP interfacewas connected to a SIP trunkfrom an Internet Telephony Service Provider and the T1 interfaceconnected into the legacy PBX. The dialplan on the Adtran was programmed so that no changes to the legacy PBX was required.

The country club's monthly telecommunications costs for voice and Internet services have been reduced by over 50 percent as a result of these changes.

Multi-Business Voice Deployment

This enterprise client has threeindependent businesses serviced by the same group of employees. One business has the requirement to have all calls answered in real-time - if the person left the office to go into the warehouse or storage area, a speed-dial key on the phone would enable a follow-mecapability that forwardedincoming business callsto the cell phone of the employee. So the employee could distinguish incoming business calls from personal calls on their cell phones and respond with a business greeting (e.g. "This is Acme Business, Sally Jones speaking, how can I help you"), the follow-me feature when enabled needed to replace the caller's telephone number with the number of the business. When the employee returned to the office, the speed-dial key on the phone would be pressed again to disable the follow-me feature, and allow business calls to be once again answered on the office phone.

To meet these requirements, Louisa Voice deployed an Asterisk telephony server application to service the needs of these three independent businesses.

Medical Practice Voice deployment

A busy medical practice required a new phone system to replace their aging analogue phone PBX. A key requirement was SIP trunk integration with the Edge SIP gateway provided by their cable company and the ability to have multiple line appearances of the main line across their phone sets. SipXecs was deployed with branded Polycom VVX 400 phones with bridged line appearance enabled on their main line and configured across all phones. SipXecs was successfully integrated with the Edge SIP gateway provided by the cable company for public voice connectivity.