Key Specifications & Features

• 4 × FXO ports — i.e., four analog/PSTN trunk lines can be connected to your IP/SIP network. wavesat.net+3grandstream.com+3grandstream.com+3

• 2 × RJ-45 network ports (10/100 Mbps, LAN/WAN) for network connectivity. grandstream.com+2grandstream.com+2

• Codec support: G.711 A/µ-law, G.723, G.729, GSM etc. Fax support T.38. grandstream.com+1

• Advanced telephony features: caller ID, flexible dial plans, etc. grandstream.com+1

• Security: SRTP, TLS, provisioning via HTTP/TFTP, designed for compatibility with major IP-PBXs. grandstream.com+1

• Fail-over on power failure: ability to fail back to PSTN trunk in case of SIP link loss or power issues. grandstream.com+1

⚠️ Important Deployment Considerations (for India/Bengaluru)

Since you’re in Bengaluru and likely integrating with a SIP trunk or IP-PBX, here are points to check:

1. Trunk compatibility

   • Ensure the FXO ports match your PSTN/analogue line specs (voltage, impedance).

   • If you’re using digital trunks instead of analogue, note this device is FXO (analogue) not E1/PRI.

2. Call capacity & growth

   • This model handles 4 FXO lines. If you anticipate more trunk lines or growth, you might consider an 8-port variant (GXW4108) or higher-density gateway.

3. Integration with your SIP/IP-PBX

   • Check codec compatibility (especially if you plan to use G.729 to save bandwidth).

   • Ensure DTMF methods (RFC2833, SIP INFO, in-band) are supported and match your system.

   • Confirm network readiness: QoS, latency, jitter, and ensure gateway has proper connectivity.

4. Power & installation setup

   • It uses an external power supply (12V DC in some specs) or appropriate PSU. wavesat.net+1

   • Ensure rack/desktop space, ventilation, and that the gateway is properly connected.

5. Support & firmware

   • Check that Grandstream has support in India (spares, firmware updates).

   • Confirm the current firmware version and if any known limitations or end-of-life status.

6. Use case suitability

   • If your scenario is “connect 4 PSTN lines into SIP trunk” this device fits well. If you have more lines, or need digital trunks (E1/PRI), you’d need a different model.

   • Consider future-proofing (e.g., if migrating to fully IP trunks rather than PSTN).