Grandstream · Egypt
Business phones that survive the network they run on.
Grandstream IP telephony: handsets, gateways and PBX, designed and installed as part of the network, not bolted on to it afterwards.
What we deliver
IP PBX
On-premise or cloud call handling with extensions, IVR, ring groups, call recording and reporting configured to how the business actually answers calls.
Handsets & DECT
Desk phones, conference units and cordless coverage for warehouses, factory floors and sites where staff are not sitting at a desk.
Gateways & trunks
Analogue and SIP gateways, provider trunk configuration, and a migration path from an existing legacy PBX.
Why the network matters more than the phone
Almost every “the phones are bad” call we take turns out to be a network problem, not a telephony problem. Voice is the first thing to break when a network is flat, unsegmented or oversubscribed, and the last thing anyone suspects.
Voice VLANTelephony separated from data so a large file transfer cannot break a call.
QoSPrioritisation configured end to end on the switching, not just enabled on the PBX.
PoE budgetSwitch power capacity checked against the handset count before deployment rather than discovered when the twentieth phone will not boot.
One teamBecause we run the switching and the firewall as well, a call-quality problem does not turn into two vendors blaming each other.
What we actually configure, the PBX, the trunks and the network under them
A phone system is judged on two things: whether calls sound right, and whether the call gets to the right person. The first is almost always a network problem. The second is a configuration problem nobody wrote down. Both are avoidable, and both are decided before the handsets arrive.
The call flow: how the business actually answers
Extensions, departments and numberingA numbering plan with room to grow, mapped to a real organisation chart. Direct dial numbers assigned where they matter, so a client reaches a person rather than a menu.
Auto-attendant that respects the callerShort menus, an obvious route to a human, and a defined answer for the option nobody chooses. Long IVR trees are the most reliable way to lose a customer who is ready to buy.
Ring groups and queuesSimultaneous or sequential ringing chosen per department, with hunt order, wrap-up time and an overflow destination, so a call is never simply ringing out somewhere nobody sits any more.
Time conditions and holidaysWorking hours, the weekend as it actually falls in Egypt, Ramadan hours and public holidays configured, with an out-of-hours route that is answered or explicitly says it will not be.
Voicemail to emailMessages delivered to the mailbox, so they are seen the same day rather than sitting behind a message-waiting light on an empty desk.
Call recording, with retention and consentRecording on the extensions where the business needs it, stored with a defined retention, access limited to named people, and a policy that acknowledges callers should be told.
ReportingCall detail records and queue statistics: answered, abandoned, average wait, because “the phones are busy” is not a number anyone can manage against.
Continuity when the line dropsA defined failover: calls diverted to mobiles or to a second site if the trunk or the internet fails. Configured and tested, not assumed.
Trunks, codecs and the provider side
SIP trunk registrationRegistration or IP-based authentication set up with the provider, credentials held properly, and concurrent-call capacity matched to the busiest hour rather than to headcount.
Codec choice made deliberatelyHigher-quality codecs sound better and use more bandwidth per call; compressed ones fit more calls down a thin link and sound like it. We choose per site against the actual circuit, and disable the rest so negotiation is predictable.
Caller ID presented correctlyOutbound identity set so calls are not rejected or shown as unknown, a surprisingly common reason customers do not answer.
Emergency numbersReachable from every extension without a prefix anybody has to remember, and routed correctly per site.
Fax, honestlyFax over IP is fragile. Where a fax line genuinely still matters, we keep it on an analogue gateway or a dedicated line rather than pretending it will survive a compressed codec.
Toll fraud protectionInternational dialling restricted by extension, strong extension secrets, and rate limits. An exposed PBX with weak passwords can generate an enormous bill overnight, and it is one of the most common attacks on any phone system.
Handsets and provisioning
Zero-touch provisioningHandsets pull their configuration from a provisioning server on first boot. Fifty phones deployed by plugging them in, not by typing settings into fifty screens.
Templates, not one-off configurationA standard profile per role, so a replacement handset is a swap rather than a rebuild, and a change applies everywhere at once.
Busy-lamp keys designed for the jobReception sees the people they transfer to. A warehouse phone does not need a screen full of keys nobody uses.
Cordless coverage surveyedDECT base stations placed against a walk test in the actual building. Warehouses, factory floors and basements are where cordless coverage is claimed and not delivered.
Firmware controlled centrallyOne known-good firmware across the fleet, updated on a schedule. Mixed firmware is where intermittent, unreproducible call faults come from.
The network underneath, where the faults actually are
Voice VLAN, assigned automaticallyPhones land on their own VLAN without anyone configuring the port by hand, with the PC behind the phone still on the data VLAN. One large file transfer should never be able to affect a call.
Quality of service marked and trusted end to endVoice media and signalling marked correctly, and, the part usually missed, the switches actually configured to trust and prioritise those markings. Enabling QoS only on the PBX achieves nothing.
SIP inspection turned off on the firewallThe firewall feature that claims to help SIP is, in practice, the most common cause of one-way audio and dropped registrations. We disable it and handle the traversal properly instead.
Media ports and NAT handled explicitlyThe audio range permitted and translated consistently. One-way audio is almost always this, and almost never the handset.
PoE budget verifiedHandset power totalled against the switch budget before deployment, rather than discovered when the last phones on a floor refuse to boot.
Jitter, loss and latency measuredThe link tested under load before go-live. Voice tolerates very little loss, and a circuit that browses perfectly can still be unusable for calls.
When it does go wrong. What it usually is
| Symptom | What people blame | What it almost always is |
|---|---|---|
| One-way audio | The handset or the provider | SIP inspection on the firewall, or the media port range not passing correctly through NAT. |
| Choppy or robotic speech | The internet being “slow” | Jitter and packet loss on a link with no working prioritisation, usually because QoS is marked but not trusted at the switch. |
| Phones drop registration | The PBX | Firewall session timers expiring faster than the registration interval, or SIP inspection rewriting packets. |
| Phones will not power on | Faulty handsets | The switch’s total PoE budget exhausted, even though every individual port is fine. |
| Echo on external calls | The far end | An analogue gateway or line interface not matched to the local line, or a speakerphone in a hard-surfaced room. |
| Calls fine, then bad every afternoon | The provider | Contention on the circuit at the busiest hour, with no bandwidth reserved for voice. |
Where we draw the line. Because we run the switching and the firewall as well, a call-quality problem does not become two suppliers blaming each other. We can prove where it is. And if your circuit genuinely cannot carry voice, we will tell you that before you buy a phone system rather than after.
Tell us how many extensions and how many sites
We will design the system, specify the handsets, and check whether the network underneath can carry it before you buy anything.
Book the free assessment02 35375791