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Small and mid-sized businesses replacing an aging phone system usually ask the question backwards. Instead of "what does a modern phone system cost?", the useful question is "what does it cost to keep missing calls, paying legacy line rental, and maintaining hardware nobody supports anymore?" This guide walks through the budget lines of a modern Redstone deployment honestly — including the ones sales conversations tend to skip.
One-Time Costs
| Line Item | What It Covers | Planning Note |
|---|---|---|
| PBX platform | REX IP-PBX sized to user count and call volume | Size for peak concurrency, not extension count |
| Gateways | RGW units for analog devices and surviving lines | Inventory faxes, door phones, paging first |
| IP phones | NRP desk phones per user; softphones cost nothing extra | Not every user needs a desk phone |
| Installation | Configuration, cutover, user training | Budget training time; it pays back in weeks |
| Network readiness | Switch capacity, PoE, QoS setup where neededOften minor; occasionally the real work |
Recurring Costs
- SIP trunk service — pooled concurrent-call capacity replacing per-line rental; typically the largest ongoing line, and typically smaller than the ISDN bill it replaces
- Number porting (one-time) — keep existing published numbers; start the carrier process early
- Maintenance and support — platform updates and vendor support; on-premises platforms spread this across years
- Backup connectivity (optional) — an EGW50 4G LTE link for sites where every call matters
The Savings Ledger
The budget story has an income side too. Organizations consolidating lines onto SIP trunks routinely cut telephony recurring costs substantially. Inter-site and inter-branch calls become free internal calls. Maintenance contracts on end-of-life PBX hardware disappear. Staff time spent juggling separate systems — voicemail here, phone admin there — consolidates into one interface. For most SMBs, the modernization pays back within one to two budget cycles.
Line Items Teams Forget
- Headsets — front-desk and support staff need them; quality headsets prevent the "the new system sounds bad" complaint
- Uninterruptible power — voice dies with the power supply; a small UPS keeps the PBX and core switches alive
- Emergency and compliance call flows — emergency line routing must be verified after cutover, not assumed
- Growth headroom — licensing and hardware sized for next year's headcount avoid a second purchase
A Sane Ordering of Events
Measure before you buy: pull twelve months of telephony invoices, measure concurrent-call peaks, and inventory every analog device that must survive. Size the platform to measured reality, choose deployment — on-premises REX, cloud, or hybrid — against your cost horizon and IT capacity, and phase the cutover around business calendars. Redstone provides sizing guidance and budget worksheets so the numbers you plan are the numbers you deploy.
Get a right-sized budget estimateRedstone Systems, Inc. founded in Delaware, USA in December 2002, has been the ODM vendor for many well-known communications companies, serving the Southeast Asian market. In 2020, Redstone Systems will begin to return to the North America market with its self-developed brand.
Redstone has a complete product line of intelligent voice gateways, providing IP-PBXs, analog VoIP gateways (FXS/FXO), digital VoIP gateways (E1/T1), border appliances, and session boundary controllers (SBCs).
With advanced technology in digital signal processor (DSP), speech coding and speech processing, as well as efficient operational tools such as cloud remote management, auto provisioning, Redstone gateways are widely used in markets of enterprise communications, cloud communications, call centers, operators’ IMS/SIP trunks, bringing users friendly, efficient and reliable communication experience.
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