Selecting the right POTS replacements depends on matching the technology to your applications and business priorities. The decision goes well beyond just cost savings. Reliability, scalability, service quality, security and even compliance with regulations and standards all need to be considered. Granite offers a comprehensive selection of POTS alternatives, all of which include local, LD, directory listing, operator assistance, number portability and toll-free termination and are compatible with E911 and STIR/SHAKEN requirements.

Find the solutions that work best for you.

ATA

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Granite EPIK

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SIP Trunks and Emulated PRI

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Voice over Cable

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UCaaS

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Teams Direct Routing

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POTS Alternatives Comparison

 
ATA
Granite EPIK
SIP Trunks and Emulated PRI
Voice over Cable
UCaaS
Teams Direct Routing
What is it
ATA
ATA (Analog Telephone Adapter) lets you plug analog devices into an existing LAN, emulating POTS without having to upgrade PBX equipment.
Granite EPIK
MFVN (Managed Facilities-based Voice Network) is a direct POTS replacement that supports voice, alarms, elevators, meters and many other analog devices using wireless LTE connectivity as primary access. Patented technology provides a Class 5 Softswitch, peered directly with the PSTN using SS7 protocol.
SIP Trunks and Emulated PRI
SIP (Session Initiation Protocol) trunks enable VoIP lines to be connected to a traditional PRI or IP on-premises PBX, tapping our state-of-the-art voice optimized network. With a Granite SIP to PRI adapter, SIP trunks can replace a PRI circuit, enabling the use of SIP trunks with PBX devices that require a PRI handoff. Whether native SIP or emulated PRI, Granite SIP trunks are typically delivered over Granite private network transport for end-to-end monitoring and control.
Voice over Cable
MFVN solution that uses an onsite cable connection with an eMTA (embedded multimedia terminal adapter) terminating in an RJ11 jack to plug in analog device; supports 8 lines; can expand by stacking up to 24 eMTAs.
UCaaS
Cloud-based PBX service, accessed via computer or physical phones.
Teams Direct Routing
Cloud-based PBX service using Microsoft Teams technology.
Suggested applications
ATA
  • Traditional phones
  • Paging
  • Door boxes
Granite EPIK
  • Fire and security alarm circuits
  • Elevator voice circuits
  • “Blue light” boxes
  • Fax machines
  • SCADA and analog modems
SIP Trunks and Emulated PRI
  • Customers that already have invested in IP PBX
  • Customers with traditional PBX looking to replace existing PRI circuits due to availability or price
  • Integration with existing IP communications network
  • Locations with many voice lines (including inbound and outbound contact centers); good fit for toll-free termination
  • Hub-and-spoke WAN configurations
  • Multiple data centers
Voice over Cable
  • Traditional phones, paging, door boxes
  • Fax, POS, elevator phones and other data applications may work, but in general other solutions are better
UCaaS
  • Customers with end-of-life PBX equipment
  • Priority on easy rollout, maintenance
  • Businesses with locations that have a high concentration of employees with desk phones and computers
  • Smaller businesses that want a sophisticated, turnkey, low-capital solution
  • Customers who are looking for full-featured voice, audio and video conferencing with minimal up-front investment
  • Unified messaging, instant messaging with presence indicators
Teams Direct Routing
  • Businesses with many employees that require voice communications and have a computer using Office 365
Advantages
ATA
  • Low-cost
  • Easy plug and play installation for up to 8 lines
  • Features include call waiting, call forwarding, caller ID, hunt and transfer
Granite EPIK
  • NFPA 72 and MFVN compliant
  • Minimal inside wiring required
  • Compatible with virtually all TDM devices
  • Supports high-volume, long-form and eFax with store-and-forward technology
  • Complies with HIPAA standards
  • Can support value-added features, including auto-attendant and IVR functionality
  • Built-in battery backup
  • Remote monitoring
SIP Trunks and Emulated PRI
  • Significant cost savings (when solution fits)
  • Compatible with legacy IP PBXs
  • Scalability; easy to increase number of call paths as business grows
  • No maintenance for physical equipment
  • Granite offers free interoperability testing prior to contract signature
  • Carrier agnostic
  • Granite’s SIP Portal allows management of many SIP services, including call rejection, call blocking, forwarding and caller ID
Voice over Cable
  • Significant cost savings (when solution fits)
  • Single box solution for POTS alternative and broadband connectivity
  • Voice over Cable solution may be MFVN-certified for alarm applications; however, given regional variation, compatibility with alarm providers must be confirmed
UCaaS
  • Delivers sophisticated voice, audio and video, and chat functionality without any capital expense
  • Robust feature options available, including call forwarding, handling and park; auto attendant, hunt groups, voicemail, simultaneous ring and videoconferencing
  • Simplicity in implementation and management
  • Enables choice of traditional handsets, smartphone app or computer calling
Teams Direct Routing
  • Tight integration with Office 365 MS Teams; simplifies voice administration and eliminates need for PBX equipment
  • Rapid installation is possible, as Granite is a direct trunk provider
But…
ATA
  • High-usage fax, elevator lines, alarms and other data applications may not work
  • Depending on customer PBX, may not match current features
Granite EPIK
  • Not good for full PBX features such as call parking, call recording or conferencing
  • If more than 8 voice lines are required at a single site, can be combined with another EPIK device, ATA or other replacement solution
  • Some jurisdictions may require wireline connections for certain applications (Fire/Life Safety), and wireline connections may be necessary to furnish service at some locations
SIP Trunks and Emulated PRI
  • May not work with traditional analog devices, including alarms, elevator phones and faxes
Voice over Cable
  • Supports call forwarding, 3-way calling and both circular and sequential hunting, but does not provide full PBX features
  • May not be suitable for all fire and safety applications, or high-volume or long-form fax
  • Single form of access, so no failover redundancy without adding a second solution
UCaaS
  • Is not compatible with analog devices, including alarms, elevator phones, faxes and meters
  • Can’t be used if current broadband or DIA capacity is maxed
    Teams Direct Routing
    • Not a good choice if Office 365 not used today; requires E5 license or E3 with Phone System add-on
    • Is not compatible with analog devices, including alarms, elevator phones, faxes and meters

    ATA

    What is it
    ATA (Analog Telephone Adapter) lets you plug analog devices into an existing LAN, emulating POTS without having to upgrade PBX equipment.
    Suggested applications
    • Traditional phones
    • Paging
    • Door boxes
    Advantages
    • Low-cost
    • Easy plug and play installation for up to 8 lines
    • Features include call waiting, call forwarding, caller ID, hunt and transfer
    But…
    • High-usage fax, elevator lines, alarms and other data applications may not work
    • Depending on customer PBX, may not match current features
    How it works
    Back to top

    Granite EPIK

    What is it
    MFVN (Managed Facilities-based Voice Network) is a direct POTS replacement that supports voice, alarms, elevators, meters and many other analog devices using wireless LTE connectivity as primary access. Patented technology provides a Class 5 Softswitch, peered directly with the PSTN using SS7 protocol.
    Suggested applications
    • Fire and security alarm circuits
    • Elevator voice circuits
    • “Blue light” boxes
    • Fax machines
    • SCADA and analog modems
    Advantages
    • NFPA 72 and MFVN compliant
    • Minimal inside wiring required
    • Compatible with virtually all TDM devices
    • Supports high-volume, long-form and eFax with store-and-forward technology
    • Complies with HIPAA standards
    • Can support value-added features, including auto-attendant and IVR functionality
    • Built-in battery backup
    • Remote monitoring
    But…
    • Not good for full PBX features such as call parking, call recording or conferencing
    • If more than 8 voice lines are required at a single site, can be combined with another EPIK device, ATA or other replacement solution
    • Some jurisdictions may require wireline connections for certain applications (Fire/Life Safety), and wireline connections may be necessary to furnish service at some locations
    How it works
    Back to top

    SIP Trunks and Emulated PRI

    What is it
    SIP (Session Initiation Protocol) trunks enable VoIP lines to be connected to a traditional PRI or IP on-premises PBX, tapping our state-of-the-art voice optimized network. With a Granite SIP to PRI adapter, SIP trunks can replace a PRI circuit, enabling the use of SIP trunks with PBX devices that require a PRI handoff. Whether native SIP or emulated PRI, Granite SIP trunks are typically delivered over Granite private network transport for end-to-end monitoring and control.
    Suggested applications
    • Customers that already have invested in IP PBX
    • Customers with traditional PBX looking to replace existing PRI circuits due to availability or price
    • Integration with existing IP communications network
    • Locations with many voice lines (including inbound and outbound contact centers); good fit for toll-free termination
    • Hub-and-spoke WAN configurations
    • Multiple data centers
    Advantages
    • Significant cost savings (when solution fits)
    • Compatible with legacy IP PBXs
    • Scalability; easy to increase number of call paths as business grows
    • No maintenance for physical equipment
    • Granite offers free interoperability testing prior to contract signature
    • Carrier agnostic
    • Granite’s SIP Portal allows management of many SIP services, including call rejection, call blocking, forwarding and caller ID
    But…
    • May not work with traditional analog devices, including alarms, elevator phones and faxes
    How it works
    Back to top

    Voice over Cable

    What is it
    MFVN solution that uses an onsite cable connection with an eMTA (embedded multimedia terminal adapter) terminating in an RJ11 jack to plug in analog device; supports 8 lines; can expand by stacking up to 24 eMTAs.
    Suggested applications
    • Traditional phones, paging, door boxes
    • Fax, POS, elevator phones and other data applications may work, but in general other solutions are better
    Advantages
    • Significant cost savings (when solution fits)
    • Single box solution for POTS alternative and broadband connectivity
    • Voice over Cable solution may be MFVN-certified for alarm applications; however, given regional variation, compatibility with alarm providers must be confirmed
    But…
    • Supports call forwarding, 3-way calling and both circular and sequential hunting, but does not provide full PBX features
    • May not be suitable for all fire and safety applications, or high-volume or long-form fax
    • Single form of access, so no failover redundancy without adding a second solution
    How it works
    Back to top

    UCaaS

    What is it
    Cloud-based PBX service, accessed via computer or physical phones.
    Suggested applications
    • Customers with end-of-life PBX equipment
    • Priority on easy rollout, maintenance
    • Businesses with locations that have a high concentration of employees with desk phones and computers
    • Smaller businesses that want a sophisticated, turnkey, low-capital solution
    • Customers who are looking for full-featured voice, audio and video conferencing with minimal up-front investment
    • Unified messaging, instant messaging with presence indicators
    Advantages
    • Delivers sophisticated voice, audio and video, and chat functionality without any capital expense
    • Robust feature options available, including call forwarding, handling and park; auto attendant, hunt groups, voicemail, simultaneous ring and videoconferencing
    • Simplicity in implementation and management
    • Enables choice of traditional handsets, smartphone app or computer calling
    But…
    • Is not compatible with analog devices, including alarms, elevator phones, faxes and meters
    • Can’t be used if current broadband or DIA capacity is maxed
      How it works
      Back to top

      Teams Direct Routing

      What is it
      Cloud-based PBX service using Microsoft Teams technology.
      Suggested applications
      • Businesses with many employees that require voice communications and have a computer using Office 365
      Advantages
      • Tight integration with Office 365 MS Teams; simplifies voice administration and eliminates need for PBX equipment
      • Rapid installation is possible, as Granite is a direct trunk provider
      But…
      • Not a good choice if Office 365 not used today; requires E5 license or E3 with Phone System add-on
      • Is not compatible with analog devices, including alarms, elevator phones, faxes and meters
      How it works
      Back to top