VOIP and SIP in a multi location business saves an astonishing amount of money. PRIs typically costs around $500-$600 monthly recurring each. With SIP one can purchase the designed bandwidth to deploy an aggregate of call paths required to support all remote locations.
The cost dedicated channels for PRI’s at remote locations goes away. No more local loops, no more PRI’s. The cost of the centralized SIP pool and bandwith cuts expense by over 50% and is very feature rich and efficient.
SIP Trunking is typically a lower-cost alternative to Primary Rate Interfaces (PRIs) because SIP trunks can be purchased in single-trunk increments (as compared to 23 channel increments for a PRI).
With SIP trunks, a single network can be maintained within the organization, rather than having both a voice and data network. Consequently, Internet bandwidth can be used more efficiently.
Moves, Adds and Changes can be completed without major wiring upgrades.
SIP Trunks are delivered in several ways.
Over the Public Internet – SIP Trunking Anywhere
Allows any enterprise, anywhere, to adopt SIP Trunking and assign some, possibly unused, bandwidth to voice at no extra charge for the connection, and providing the highest ROI.
Managed Services
Carriers supply a dedicated, fully managed connection from their Point of Presence to the enterprise site. This service offers quality of service guarantees, but is somewhat more expensive.
MPLS Delivery
The carrier, usually an LEC, ILEC or CLEC, will delivery a managed service using Multi-Protocol Label Switching to insure the highest voice quality and reliability.
The voice quality, even over an un-managed public Internet connection, is excellent. Typical savings over PRIs range from 40-60% with the payback period for the equipment required, which may include an upgrade to the IP-PBX and the installation of an VOIP SIP QOS irewall, has been shown to range from 4 to 12 months.
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