VoIP Gateway Pakistan:Sangoma Vega E1, PRI and Analog GatewaysDeployed by Capstar Solutions
Keep your E1 lines, analog phones, and existing PBX working while you move to SIP. Capstar Solutions is the VoIP gateway Pakistan enterprises call when the conversion has to work the first time: we size the Sangoma Vega model, configure it against your carrier and PBX, and stay on for support.
Up to 120 calls
8 km line length
E1 · FXS · FXO · SIP
3 offices in Pakistan
The problem
Why Pakistani Enterprises Still Need a VoIP Gateway
Most organizations do not move to VoIP in one weekend. Circuits, handsets, and wiring from the last twenty years are still in daily use, and ripping them out costs a lot. A gateway lets the old and new estates run together. These are the three situations we see most often.
Your users only notice the phone system when a call fails. That is the standard a migration has to meet.
Not Ready to Drop E1 Circuits
Many head offices and contact centers use E1 PRI circuits for their main numbers, but some may have aging PBXs or be transitioning to SIP-only IP-PBXs.
What a gateway does: it terminates each E1 and hands the calls to your IP platform as SIP, so the numbers your customers dial stay the same.
Analog Phones Expensive to Replace
Hotel rooms, hospitals, hostels, and similar locations often use copper pairs for connectivity when network cables can't reach, making new IP system impractical.
What a gateway does: FXS ports give each analog phone a dial tone and make it appear to your IP-PBX as an ordinary extension.
Ssingle Point of Failure at the Branch
When every call depends on a hosted platform or a head-office PBX, a fiber cut or a WAN outage silences the whole branch, including internal calls.
What a gateway does: local survivability keeps extensions calling each other and routes outbound calls to a local line until the link returns.
What Is a VoIP Gateway, and What Are SIP and PSTN Gateways?
A VoIP gateway translates between two kinds of phone lines. On one side are circuit-switched connections such as E1 PRI, BRI, and analog lines. On the other side is your IP network, where calls travel as SIP.
You will hear the same device called by different names, depending on which side the speaker cares about:
SIP Gateway
Emphasizes the IP side: the box presents every call to your PBX or carrier as a SIP session.
PSTN Gateway
Emphasizes the carrier side: the box connects an IP-only phone system to the public telephone network over E1 or analog lines.
E1 PRI Gateway
A digital model with E1 ports. One E1 PRI carries up to 30 simultaneous calls.
FXS/FXO Gateway
FXS ports provide dial tone to phones, faxes, and entry units, while FXO ports connect to a PSTN line or PBX extension.
Inside, the gateway handles the parts that break a migration when they are done badly: codec transcoding, echo cancellation, fax relay, caller ID and the dial plan that decides where each call goes.
Analog Phones/Fax
Sangoma Vega
IP PBX - SIP Trunk
A Systems Integrator, Not a Box Seller
You can buy an FXO gateway from an online store in Pakistan in an afternoon. The difficult part is making it work with your carrier’s E1 signalling, your PBX dial plan, your fax machines and your failover plan, then being reachable when a call fails at month-end.
Capstar Solutions works across Microsoft Teams Direct Routing in Pakistan, Zoom Phone, session border controllers and contact centers. So when we scope a VoIP gateway Pakistan deployment, the design starts from the platform you are moving to, not only the lines you have today.
Most gateway problems are cabling, signalling or dial-plan problems. That is where our engineering time goes.
Product Lineup
Sangoma Vega Gateway Models We Supply and Deploy
The Sangoma Vega series splits into two families. Analog models connect phones, fax machines, and PSTN lines. Digital models terminate E1 or T1 PRI circuits. All six run the same firmware and web interface, so your team learns one system, whatever the size of your VoIP gateway project in Pakistan.
Analog gatewaysFXS and FXO
Sangoma Vega 60G
A compact analog gateway for a branch office, a reception area, or a handful of PSTN lines. It supports message waiting indication and line lengths up to 8 km.
Ports: 4 or 8 FXS, 4 or 8 FXO, or 4 FXO + 4 FXS;
VoIP Channels: 4 to 8; LAN: 1 × RJ-45
Sangoma Vega 3000G
Twenty-four analog extensions on a single Amphenol connector in a compact chassis, ideal for hotels, clinics, or factory offices.
Ports: 24 FXS (1 × Amphenol)
- VoIP Channels: 24 LAN 1 × RJ-45
Sangoma Vega 3050G
Fifty analog extensions in a 19-inch rack with an internal power supply, designed for hotels, hostels, hospitals, and campuses with copper-wired phones.
Ports: 50 FXS (2 × Amphenol)
- VoIP Channels: 50 LAN, 2 × RJ-45
Digital gatewaysE1/T1 PRI
Sangoma Vega 100G
The simplest way to bring one E1 PRI into an IP-PBX or to connect an existing TDM PBX to a SIP trunk. Handles a full E1's worth of calls.
- Ports: 1 × T1/E1 PRI
- VoIP Channels: Up to 30 LAN; 2 × Gigabit
Sangoma Vega 200G
Two E1 ports for sites that need more capacity or want calls split across two circuits from different exchanges. A common fit for mid-sized contact centers.
Ports: 2 × T1/E1 PRI
- VoIP Channels: Up to 60 LAN, 2 × Gigabit
Sangoma Vega 3050G
Fifty analog extensions in a 19-inch rack with an internal power supply, designed for hotels, hostels, hospitals, and campuses with numerous copper-wired phones.
Ports: 50 FXS (2 × Amphenol)
- VoIP channels: 50 LAN, 2 × RJ-45
Use Cases
Five Ways Enterprises in Pakistan Use a Sangoma Vega Gateway
In most VoIP gateway Pakistan projects, the gateway is not the whole job. It is the piece that lets a larger change happen without downtime. These are the five designs we deploy most, including how gateways fit alongside Microsoft Teams and Zoom Phone.
Connect a Legacy PBX to a SIP trunk
Your PBX still works well, but the E1 rental is costing more than it should. A Vega 100G, 200G, or 400G terminates a SIP trunk from PTCL, Wateen, or Nayatel and presents it to the old PBX as a standard E1. The PBX keeps running, and its users see no change, while you pay SIP trunk rates.
Keep Analog Phones,and Lift Lines
FXS gateways make every analog endpoint appear to the IP-PBX as a SIP extension. That covers room phones, ward phones, fax machines, franking machines, lift emergency phones, and door-entry units. The Vega 3000G and 3050G are built for this at scale.
Give an IP-PBX or UC Platform a PSTN Connection
IP-PBX platforms such as Sangoma, Asterisk, and Avaya often rely solely on Ethernet. When you need to keep E1 PRI circuits, for backup or because of the numbers on them, a PSTN gateway provides that link. Contact centers often keep an E1 alongside SIP as a second path for inbound traffic.
Branch survivability and least-cost routing
Vega's dial planner can route calls by destination, time, or trunk availability. If the SIP route to head office fails, calls move to another SIP route or a local E1 or FXO line. Local survivability keeps on-site IP phones calling each other and the PSTN during the outage.
Analog and E1 estates alongside Microsoft Teams and Zoom Phone
First, be clear: Sangoma Vega is not on Microsoft’s list of session border controllers certified for Teams Direct Routing. Microsoft only supports Direct Routing with certified devices, so a Vega should never be the box that faces Teams.
Microsoft Teams Direct Routing
We place a certified AudioCodes Mediant or Ribbon SBC at the Teams edge. Where a site also has analog endpoints or an E1-only PBX, the Vega connects those to your IP-PBX, which sits behind the SBC.
Zoom Phone BYOC
Zoom’s Premises Peering model connects your own SBC and carrier to Zoom Phone. AudioCodes and Ribbon both publish SBCs for Zoom Phone, so they handle the Zoom edge while gateways look after legacy lines.
SBC Security Functions
Vega protects its own calls with SIP over TLS, SRTP, and digest authentication. Edge protection for the whole network, including topology hiding and attack filtering, belongs on the SBC. No SBC hardware budget? SBC as a Service covers it.
Searching for a “SIP gateway for Microsoft Teams”? Microsoft also runs a cloud service called SIP Gateway. It lets compatible SIP phones sign in to Teams. It is not a hardware VoIP gateway and does not connect to E1 circuits.
Gateway, SBC and PBX are configured as one design, then tested end to end before cutover.
FXS ports drive analog phones up to 8 km at 1 REN, which reaches gatehouses and warehouse bays with no network cable.
Features and Benefits
What You Get From a Sangoma Vega Gateway
Sangoma describes Vega as the most fault-tolerant gateway series in its class. Here is what that means in practice, grouped by the questions IT managers ask before approving a VoIP gateway Pakistan purchase.
Reliability
Local survivability keeps extensions calling if the connection to the main switch is lost. Emergency PSTN backup and flexible fallback routing reroute calls automatically. On the Vega 400G, hardware port bypass hands E1 circuits to a standby unit.
Interoperability
E1 ports support Euro-ISDN, QSIG and CAS R2MFC signalling. Codecs include G.711, G.729a, G.723.1 and G.726, with T.38 for fax and G.711 for modems. Vega works with both standards-based IP-PBXs and older TDM systems.
Scalability
Start with what you need. The Vega 400G ships with a 30-channel licence and upgrades to 120 in the field without a hardware swap. Analog capacity scales from 4 ports to 50 ports per 1U unit.
Ease of management
A Quick Wizard handles common setups, and Expert mode covers complex dial plans. The same web interface runs across the whole range. TR-069, remote firmware upgrade and built-in call tracing let our engineers fix issues without a site visit.
Security
SIP over TLS and SRTP encrypt signalling and media. Management runs over HTTPS and SSH, with configurable passwords, RADIUS login and SNMP v3. Caller ID screening only accepts calls from sources you approve.
Call Quality
G.168 echo cancellation supports tails of up to 128 ms, while adaptive jitter removal smooths network inconsistencies. Marking prioritizes voice traffic on switches. The gateway offers quality of service statistics for carrier dispute resolution.
Technology Partners
Neat Rooms Across Your Organization
We keep product choice honest by working with more than one vendor. Sangoma covers the gateway layer. AudioCodes and Ribbon cover the certified SBC edge that Microsoft Teams and Zoom Phone require.
Sangoma
VoIP GatewaysFounded in 1984, Sangoma builds the Vega gateway series alongside IP-PBX platforms, IP phones, and telephony cards. Capstar uses Vega for analog and E1 conversion. See also our Sangoma IP phones and PBX solutions.
AudioCodes
Certified SBCsAudioCodes Mediant SBCs appear on Microsoft's certified Direct Routing list, and AudioCodes publishes Zoom Phone-supported models. We use them where Teams or Zoom sits on the far side of the gateway. AudioCodes SBCs from Capstar.
Ribbon
Certified SBCsRibbon's SBC 1000, SBC 2000, and SBC SWe Edge are certified for Teams Direct Routing. Capstar is a certified Ribbon Communications Edge and Core products implementation partner in Pakistan. Ribbon SBCs in Pakistan.
VoIP Gateway vs Session Border Controller
A VoIP gateway converts legacy lines to SIP. A session border controller secures SIP where your network meets a carrier or the cloud. They do different jobs at different points in the call path.
| Attribute | VoIP gateway Legacy lines to SIP | Session border controller Guards the SIP edge |
|---|---|---|
| Main job | Converts analog or E1 calls to SIP | Secures and normalises SIP between networks |
| Interfaces | FXS, FXO, BRI, E1/T1 plus Ethernet | Mainly Ethernet (IP to IP) |
| Where it sits | Between legacy lines or phones and the LAN | At the edge, between your network and a carrier or cloud |
| Security role | TLS, SRTP and digest authentication on its own calls | Topology hiding, attack filtering and policy for all SIP traffic |
| Teams Direct Routing | Not a certified Teams edge device | Required, from Microsoft's certified list |
Technical Specifications
Sangoma Vega Specifications Compared
Every figure below comes from Sangoma’s Vega Series datasheet and product pages. Use the table to shortlist models. We then confirm the exact configuration against your circuits during the site survey that starts every VoIP gateway Pakistan project we deliver.
| Model | Telephony interfaces | VoIP channels | LAN ports | Power supply | Redundancy options |
|---|---|---|---|---|---|
| Vega 60G | 4/8 FXS, 4/8 FXO or 4 FXO + 4 FXS | 4–8 | 1 × RJ-45 | External | Local survivability, fallback routing |
| Vega 3000G | 24 FXS | 24 | 1 × RJ-45 | External | Local survivability, fallback routing |
| Vega 3050G | 50 FXS | 50 | 2 × RJ-45 | Internal | Local survivability, fallback routing |
| Vega 100G | 1 × T1/E1 PRI | Up to 30 | 2 × Gigabit | External | Local survivability, fallback routing |
| Vega 200G | 2 × T1/E1 PRI | Up to 60 | 2 × Gigabit | External | Local survivability, fallback routing |
| Vega 400G | 4 × T1/E1 PRI + 4 failover ports | Up to 120 (licensed 30/60/90/120) | 2 × Gigabit | Internal | Hardware failover using port bypass, plus the above |
Swipe the table sideways to see every column.
Industries Served
Where Vega Gateways Earn Their Place
Any organisation with legacy lines and an IP roadmap can use a gateway. These are the sectors where the business case for a VoIP gateway Pakistan buyers evaluate is usually clearest.
Enterprise, Banking and Government
Head offices keep E1 circuits for their published numbers while branches move to SIP. Dual gateways with hardware bypass protect lines that cannot fail, such as customer helplines and treasury desks.
Healthcare
Wards, nurse stations, lifts, and pharmacies rely on analog phones and fax machines that must keep working. High-density FXS gateways connect them to the hospital's IP-PBX without new cabling.
Contact Centers and BPOs
High call volumes run over two paths, E1 and SIP, so one carrier fault does not empty the queue. Vega 200G and 400G units carry up to 60 or 120 calls into the contact center platform.
Education
Universities and schools spread phones across hostels, labs, and gatehouses. The 8 km FXS reach lets a central comms room serve buildings without network cabling.
Hospitality
Hotels keep their existing room phones and in-room wiring while the front desk and back office move to an IP-PBX. Message waiting indication on analog lines keeps the voicemail lamp working.
Manufacturing and Logistics
Production floors, warehouses and loading bays are harsh places for IP handsets. Rugged analog phones on FXS ports keep supervisors reachable and link the site to head office over SIP.
Frequently Asked Questions
VoIP Gateway Pakistan FAQs
The questions IT managers and telecom heads ask us most often before choosing a gateway.
What does a VoIP gateway do?
A VoIP gateway converts phone calls between traditional telephone lines and an IP network. It takes calls arriving on E1 PRI circuits, BRI lines, or analog lines and turns them into SIP calls for an IP-PBX, a SIP trunk, or a cloud phone system, and does the reverse for outbound calls. Along the way, it handles codec transcoding, echo cancellation, fax relay, and call routing.
What is the difference between a VoIP gateway and a session border controller?
A VoIP gateway connects different line types, such as analog or E1, to SIP. A session border controller connects IP networks and secures SIP traffic between them with topology hiding, attack filtering, and policy control. Enterprises moving to Microsoft Teams or Zoom Phone often need both: the SBC at the network edge and a gateway for legacy lines and analog devices.
Can a Sangoma Vega gateway connect directly to Microsoft Teams Direct Routing?
No. Sangoma Vega is not on Microsoft’s list of session border controllers certified for Direct Routing, and Microsoft only supports Direct Routing with certified devices. Capstar Solutions deploys a certified AudioCodes or Ribbon SBC at the Teams edge and uses Vega gateways to connect analog endpoints and E1 circuits to the IP-PBX behind it.
Does a Sangoma Vega gateway work with Zoom Phone BYOC?
Zoom Phone Bring Your Own Carrier Premises Peering connects your own SBC and carrier to Zoom Phone, so the Zoom-facing device should be an SBC documented for Zoom Phone, such as AudioCodes or Ribbon. A Vega gateway fits into the same design by converting analog lines, fax machines, or an E1-only PBX to SIP on your side of that SBC.
How many calls can one E1 PRI gateway handle?
One E1 PRI carries up to 30 simultaneous calls. The Sangoma Vega 100G has one E1 port for up to 30 calls; the Vega 200G has two E1 ports for up to 60 calls; and the Vega 400G has four E1 ports for up to 120 calls. The Vega 400G is licensed in steps of 30, 60, 90, or 120 channels and can be upgraded in the field.
What is the difference between FXS and FXO ports?
An FXS port supplies dial tone and ringing voltage, so you plug analog phones, fax machines, and door-entry units into it. An FXO port receives dial tone, so you plug it into a carrier PSTN line or an extension port on an existing PBX. Use an FXS gateway to keep analog phones on an IP PBX, and an FXO gateway to bring analog phone lines into it.
What happens to calls if the internet or SIP trunk goes down?
Sangoma Vega gateways include local survivability. If the connection to the hosted platform or main PBX is lost, local phones can still call each other and reach the PSTN through a connected E1 or analog line. The dial plan can also send calls to a second SIP route. On the Vega 400G, bypass ports let a standby unit take over the E1 circuits if the primary gateway fails.
How long does a VoIP gateway deployment take in Pakistan?
A single-site gateway replacing one E1 or a small analog estate is usually surveyed, staged, and cut over within a few weeks, most of which is carrier coordination. Multi-site projects with SBCs, Microsoft Teams, or Zoom Phone integration take longer. Capstar Solutions gives you a dated plan after the site survey, not a guess before it.
What is the VoIP gateway price in Pakistan?
VoIP gateway price in Pakistan depends on the model, the number of E1 channels or analog ports, the license tier, exchange rates, and import duties at the time of order. Installation, configuration, and support are quoted separately. Capstar Solutions provides an itemized quote after a short sizing call, so you pay for the capacity you actually need.
Get Started
Get a Gateway Sizing and Quote
Please tell us what lines and phones you have today and where you want to end up. We will recommend the right Sangoma Vega model for your VoIP gateway rollout in Pakistan, explain the design in writing, and send an itemized quote. We respond within one business day.
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