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.
IP telephony topology IP-PBX with desk IP phones on PoE
- Desk IP Phones
- Cat6 Cabling
- PoE Switch (Voice VLAN + QoS)
- IP-PBX
- SIP Trunk + Backup Gateway
- Operator Console
Homes: a small hybrid PABX on a UPS keeps the gate and guard lines working during outages.
Best for New offices with Cat6 cabling IVR, queues and call recording Multi-branch calling over the network
Equipment checklist
- Required IP-PBX, extension licenses, desk IP phones, PoE switch ports, Cat6 cable
- Conditional SIP trunk, FXO / GSM backup gateway, rack, UPS
- Optional Headsets, conference phones, call recording
What to size
- Extensions and concurrent calls
- SIP channels and provider compatibility
- PoE switch power budget
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 wired IP solution: an IP-PBX with PoE desk IP phones on Cat6, plus a backup gateway for outside lines. It contains no analog phones and no wireless handsets.
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 · Wired IP Phones
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
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: IP-PBX platform
IP-PBX
Buying guide
Match extensions, concurrent calls and trunk ports.
Details
- Check before buying: Extension limit, concurrent calls and built-in FXO / FXS ports
- Common mistake: Choosing by extension count but ignoring concurrent calls
How to choose
- Check both the extension limit and concurrent-call limit
- Built-in FXO ports connect existing landlines without an extra gateway
- Confirm IVR, queues, recording and mobile app are included or licensed
- An on-site appliance keeps working when the internet is down
Rule of thumb
For a home, pick an IP-PBX whose concurrent-call limit covers your busiest hour, with spare extensions.
Key specifications to compare
- Extensions
- concurrent calls
- FXO / FXS ports
- SIP trunks
Right product when
Extensions, concurrent calls and features fit today's needs with room to grow.
Step 3: SIP trunk & outside lines
Gateways & Trunks
Buying guide
Confirm the provider, channels and a backup route.
Details
- Check before buying: SIP provider, channel count, codecs and failover lines
- Common mistake: Assuming any SIP trunk works with any PBX
How to choose
- Check the SIP provider is tested with your PBX model and supports G.711 / G.729
- Channels = simultaneous outside calls at the busiest hour
- Keep a PSTN or GSM gateway line as backup when the internet fails
- Use a static IP or a provider that supports registration behind NAT
Rule of thumb
Keep at least one PSTN or GSM line through a gateway so calls still work when the internet is down.
Key specifications to compare
- SIP provider
- channels
- G.711 / G.729
- FXO / GSM backup
Right product when
Provider is verified with the PBX and a backup route exists.
Step 4: Desk IP phones
IP Phones
Buying guide
Pick line keys, display and PoE to suit each role.
Details
- Check before buying: Phone models supported by the PBX and PoE class
- Common mistake: Mixing unsupported phone models
How to choose
- Basic 2-line phones suit most desks; managers and reception need more line / BLF keys
- PoE phones need no power adaptor; check the switch budget
- HD voice and a gigabit port help when the PC connects through the phone
- Prefer models on the PBX vendor's auto-provisioning list
Rule of thumb
Use basic PoE phones on most desks and multi-line BLF phones at reception and for managers.
Key specifications to compare
- Lines / BLF keys
- PoE
- HD voice
- gigabit port
Right product when
Models are confirmed with the PBX and powered by PoE.
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 & rack
Cabling & Rack
Buying guide
Cat6 to every desk, patch panel and rack space.
Details
- Check before buying: Cable runs, patch panel ports and rack units
- Common mistake: Sharing one cable between PC and phone without a pass-through port
How to choose
- Run solid copper Cat6 to every desk and keep runs within 100 m
- Terminate on a patch panel and label every port
- Phones with a PC pass-through port can share one cable per desk
- Plan rack space for the PBX, switch and gateway
Rule of thumb
Run one labelled Cat6 per desk and use the phone's PC port when cabling is limited.
Key specifications to compare
- Cat6
- patch panel
- rack units
Right product when
Every desk has a tested, labelled Cat6 run.
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.