Maintenance & Annual Maintenance Contracts (AMC)
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PABX & IP Telephony · Home
Simple Intercom and Calling for Every Room
Connect rooms, the gate and the guard post with extensions and an intercom that keep working through power cuts.
- Room-to-room intercom
- Gate & guard extension
- Mobile app extensions
- Backup power support
Choose Your Solution
Architecture, buying guide, compatible products and the Package Builder all follow the solution you pick.
Hybrid telephony topology Analog and IP extensions on one system
- Analog + IP Phones
- Existing Cabling + Cat6
- Hybrid PABX / IP-PBX
- FXO / FXS Gateway
- PSTN + SIP Trunk
- Operator Console
Keep working analog phones and lines, and add IP extensions where new cabling is available.
Best for Upgrading an existing analog system Keeping working phones and lines Phased move to IP
Equipment checklist
- Required Hybrid PABX or IP-PBX, FXS / FXO ports or gateway, phones
- Conditional SIP trunk, PoE switch, Cat6, rack, UPS
- Optional Headsets, conference phones, call recording
What to size
- Analog (FXS) ports and IP extensions, counted separately
- FXO / GSM lines and SIP channels
- PoE budget for the new IP phones
Sizes follow your site survey. The recommended setup below is already matched to this solution.
Choose Your Devices for Home
Every option below is compatible with this solution and comes from different brands and models. Choose one IP-PBX platform; the parts that must match its brand update automatically.
A home needs room-to-room intercom, a gate and guard-post line and calls that keep working through power cuts. A small PBX on a UPS covers all of it without a monthly bill.
This is the hybrid solution: an IP-PBX with IP phones where cabling exists, and an FXS gateway so working analog phones stay in service during the move to IP.
Typical size: 6–12 extensions with 1–2 outside lines.
Your setup
0 devices, one of each. Estimated:
Quantities are set in the Package Builder after your site survey.
Buying Guide: IP Solution · Hybrid PABX
What to check at each step. Tap a step to open it; products are chosen above in “Choose Your Devices”.
Step 1: Extensions, lines & call needs
Planning step
Buying guide
Count users, departments, outside lines and peak calls.
Details
- Check before buying: Users per department, outside lines and busiest-hour calls
- Common mistake: Sizing by headcount only
How to choose
- List every desk, department and shared phone (the gate first) that needs an extension
- Count outside lines from your busiest hour, not total staff
- Note features you need: call transfer, ring groups, IVR menu, voicemail, recording
- Add 20–30% spare extensions for growth
- Mark which existing analog phones and lines still work and will be kept
Rule of thumb
A useful rule for a home: outside lines ≈ 1 for every 4–6 staff, then add spare extensions for growth.
Step 2: Hybrid PBX platform
Hybrid PABX / IP-PBX
Buying guide
Count analog and IP extensions separately.
Details
- Check before buying: Analog (FXS) ports, IP extensions, and PSTN (FXO) + SIP trunks
- Common mistake: Running out of analog ports after the move
How to choose
- A hybrid PABX has analog extension cards plus IP extensions
- An IP-PBX with FXS ports or a gateway also keeps analog phones working
- Count analog ports, IP extensions and outside lines separately
- Plan which analog phones are replaced in each phase
Rule of thumb
Count analog phones to keep and new IP phones separately, then pick a platform that covers both with spare.
Key specifications to compare
- FXS ports
- IP extensions
- FXO / SIP trunks
Right product when
Analog and IP capacity both cover today with spare.
Step 3: FXO / FXS gateways
Gateways & Trunks
Buying guide
Connect old phones and lines to the IP system.
Details
- Check before buying: FXS ports for analog phones and FXO ports for landlines
- Common mistake: Mixing up FXS and FXO ports
How to choose
- FXS ports connect analog phones and fax machines to an IP-PBX
- FXO ports connect PSTN landlines to an IP-PBX
- GSM gateways add mobile SIM lines
- Size ports for today plus the next upgrade phase
Rule of thumb
FXS for phones, FXO for landlines: count each before choosing a gateway.
Key specifications to compare
- FXS ports
- FXO ports
- GSM ports
Right product when
Port types and counts match the phones and lines you keep.
Step 4: Phones: keep analog, add IP
Phones
Buying guide
Reuse working analog phones and add IP phones where needed.
Details
- Check before buying: Which desks get new IP phones in this phase
- Common mistake: Replacing every phone at once without need
How to choose
- Keep working analog phones on FXS ports
- Give reception and managers IP phones with BLF keys first
- Choose IP phone models supported by the PBX
- Plan PoE or adapters for new IP phones
Rule of thumb
Upgrade reception and high-use desks to IP first; keep other analog phones until the next phase.
Key specifications to compare
- Analog / IP
- BLF keys
- PoE
Right product when
Each desk has a supported phone and a clear upgrade path.
Step 5: Network, voice VLAN & PoE
PoE Switches
Buying guide
Give voice its own VLAN, QoS and enough PoE.
Details
- Check before buying: Switch ports, voice VLAN / QoS support and PoE watt budget
- Common mistake: Voice on an overloaded office LAN
How to choose
- Put phones on a voice VLAN with QoS so calls stay clear when the LAN is busy
- Most IP phones draw 3–7 W (802.3af); sum all phones and base stations
- Choose a switch whose PoE budget exceeds the total with headroom
- Keep every Cat6 run within 100 m
Worked illustration
Illustration: 24 phones × 5 W = 120 W, so choose a 24-port PoE switch with more than 120 W budget.
Key specifications to compare
- PoE ports
- PoE budget (W)
- voice VLAN
- QoS
Right product when
Total PoE budget and ports cover every phone with headroom, with voice on its own VLAN.
Step 6: Cabling: existing + Cat6
Cabling & MDF
Buying guide
Re-test old phone pairs and run Cat6 for new IP phones.
Details
- Check before buying: Condition of existing pairs and new Cat6 routes
- Common mistake: Reusing damaged old wiring
How to choose
- Test existing telephone pairs and replace faulty runs
- Run Cat6 to desks that get IP phones
- Keep the MDF for analog extensions and a patch panel for IP
- Label every pair and port with its extension
Rule of thumb
Run Cat6 for every new IP desk and keep the MDF labelled for remaining analog phones.
Key specifications to compare
- Telephone pairs
- Cat6
- MDF / patch panel
Right product when
Old and new cabling are tested and labelled.
Step 7: IVR, queues & call recording
Recording & Headsets
Buying guide
Confirm each feature and its license on your PBX model.
Details
- Check before buying: Which features need licenses and how long recordings are kept
- Common mistake: Assuming IVR or recording is included
How to choose
- Auto attendant (IVR) greets callers and routes them by department
- Ring groups and call queues share incoming calls between staff
- Call recording needs storage; size it by recorded hours per day
- Headsets help reception and call-centre staff on long calls
Rule of thumb
List the features you need, then confirm each one is supported (and licensed) on the PBX model you choose.
Key specifications to compare
- IVR
- queues
- voicemail
- recording storage
- headsets
Right product when
Every required feature is supported and licensed on the chosen model.
Step 8: UPS & power backup
UPS & Power
Buying guide
Keep the PBX, switch and gateway running in a power cut.
Details
- Check before buying: Load of PBX, PoE switch and gateway, and the runtime you need
- Common mistake: No backup power on the phone system
How to choose
- Add the watts of the PBX, PoE switch, gateway and router
- Choose UPS runtime at the real load, not the maximum rating
- Keep emergency and reception lines on backup power
- Test and replace batteries on schedule
Rule of thumb
Put the PBX, PoE switch and gateway on a UPS so reception can still take calls during load-shedding.
Key specifications to compare
- VA / watts
- runtime
- outlets
Right product when
Runtime covers the PBX, switch and gateway for your typical outage.
Step 9: Installation & maintenance
Services
Buying guide
Plan programming, testing and a support plan.
Details
- Check before buying: Site survey, extension plan, programming and service plan
- Common mistake: No numbering plan or documentation
How to choose
- Start with a site survey and an extension numbering plan
- Program IVR, ring groups, trunks and permissions before go-live
- Test every extension, outside line and transfer
- Hand over a numbering list and admin passwords, and agree a support plan
Rule of thumb
Handover should include the extension list, IVR flow and a test of every outside line.
Key specifications to compare
- Survey
- programming
- testing
- SLA
Right product when
Scope covers survey, programming, testing and a clear support SLA.
Your installation package is calculated automatically
Open Package BuilderIP phone / extension setup ৳ 500 / extension · Equipment setup & commissioning ৳ 1,000 / device. Add products to the Package Builder and it prices the installation for you.
Compatible products · Services
View all Services
Step 10: Warranty & support
Planning step
Buying guide
Verify warranty, support and spare handsets.
Details
- Check before buying: Warranty period, support channel and spares
- Common mistake: Unclear replacement terms
How to choose
- Compare warranty length for the PBX and phones
- Confirm local support hours and remote programming help
- Keep one or two spare handsets for quick swaps
- Buy from an authorised source
Rule of thumb
Ask for warranty length, support hours and spare availability in writing.
Planning an intercom for your home?
Custom projects are quoted after consultation.