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View ServiceOverview
Modernize your business telephony by bridging traditional PSTN lines with IP-based communication networks. DG Tech's VoIP gateway services cover gateway selection, SIP trunk configuration, QoS tuning, and failover setup—enabling clear voice quality, reduced inter-office calling costs, and seamless integration with IP PBX and call center platforms.
We work with enterprises migrating from legacy EPABX systems, BPOs scaling outbound operations, and branch offices needing centralized dial plans. Our engineers configure FXO, FXS, and GSM gateways to match your call volume, redundancy requirements, and existing network architecture.
Post-deployment, DG Tech provides monitoring, troubleshooting, and capacity planning so your voice infrastructure remains stable as call patterns and headcount evolve.
What we deliver
- Gateway sizing for FXO, FXS, GSM, and SIP channels
- SIP trunk registration with Indian telecom providers
- QoS and VLAN configuration for voice priority
- Failover routing between primary and backup trunks
- Integration with Asterisk, FreePBX, and commercial IP PBX
- Call quality monitoring and codec optimization
Why it matters
- Lower long-distance and inter-branch calling costs
- Unified dial plans across offices and remote workers
- Flexible scaling by adding channels without rewiring
- Improved disaster recovery with SIP trunk redundancy
- Foundation for call center and IVR expansion
- Expert support reducing voice downtime and misconfiguration
Scope of work
Engagements are scoped to the site, device count, and the support hours you need. Typical activities for VoIP Gateway Services include:
- Current telephony assessment and call volume analysis
- Gateway hardware procurement and rack installation
- SIP account provisioning with service provider
- IP PBX dial plan and outbound route configuration
- QoS policy implementation on switches and routers
- Test calls, fax pass-through, and CLI verification
- Documentation and ongoing monitoring setup
Tools and platforms
We work with the equipment and software already in your environment, or specify hardware we can supply and install.
Grandstream GXW SeriesDinstar GSM GatewayYeastar TG SeriesCisco ISR Voice GatewaysAsteriskFreePBX3CXSIP Trunks (Jio, Airtel, Tata)
How the work runs
A short, repeatable sequence so you know who is on site, what gets handed over, and how support continues.
- 1
Telephony Audit
Existing lines, PBX type, call volumes, and pain points are documented to define gateway requirements.
- 2
Design & Procurement
Gateway model, channel count, and SIP provider are finalized. Hardware is procured and staged for configuration.
- 3
Configuration
SIP trunks, dial plans, codecs, and security settings are configured on gateway and IP PBX.
- 4
Network Optimization
QoS, bandwidth allocation, and firewall rules are applied to prioritize voice traffic.
- 5
Testing & Handover
Inbound, outbound, and failover scenarios are validated before production cutover and user notification.
Frequently asked questions
A VoIP gateway connects traditional phone lines (PSTN, GSM) to IP networks, allowing IP PBX systems and softphones to make and receive calls through standard telecom channels.
Need VoIP Gateway Services?
Tell us the locations, current setup, and the outcome you need. DG Tech will confirm scope, timeline, and whether a site survey is required.
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