• The Dasscom “DXG-Series” gateway brochure lists a 32-channel GSM/VoLTE variant under the 4/8/16/32 “VoLTE Channels” heading:

  “4/8/16/32 VoLTE Channels” in DXG Series brochure. Dasscom

• A distributor listing in India shows “Dasscom 32 port GSM gateway VOLTE” at a quoted price of ₹139,000. optimatechnologies.in

• The specification sheet for “DXG-Series GSM Gateway” (Dasscom) lists support for LTE: FDD LTE: B1/B3 in its band-table for what appears to be 2G/3G/4G variants. Dasscom

Specifications:

Since full specs are not readily available, you’ll want to confirm the following key points:

1. VoLTE Support vs GSM Only

   • Does the 32-port model support VoLTE (4G LTE voice) or only legacy GSM voice channels?

   • Are LTE bands supported for India (e.g., B3, B5, B8)? The brochure mentions LTE: B1/B3 etc. Dasscom

   • Does it fall back to 2G/3G when LTE is not available, and how stable is the fallback?

2. SIM/Channel Count & Antenna Setup

   • 32 physical channels/ports for 32 SIMs (or 16 dual-channel modules) — verify arrangement.

   • Antenna connections: Are there 32 separate antenna ports? Or are SIMs shared via combiners?

   • Signal strength and isolation per channel: 32 SIMs means strong RF planning.

3. VoIP/SIP Integration & Protocols

   • SIP v2.0 (RFC 3261) compliance, DTMF modes (RFC2833 / SIP INFO / Inband). The spec sheet suggests this. Dasscom+1

   • Codecs supported (G.711 A/µ, G.729, G.722 etc) — important for voice quality.

4. Network Interfaces & Performance

   • Ethernet ports: Are there dual LAN/WAN RJ45 ports?

   • Throughput and packet handling under full load (32 simultaneous channels) — will your network infrastructure support this without latency or jitter?

5. SMS/USSD Support

   • If you need SMS or USSD (for call centres, bulk messaging), verify that the gateway supports SMS/USSD across all channels and has bulk features. A similar 32-port VoLTE gateway spec from another brand supports these. www.gsmgateway.in+1

6. Power, Cooling & Rack-mount Specs

   • Power consumption for 32 channels under load can be significant — ensure your rack has adequate power & UPS.

   • Operating temperature and ventilation: With many RF modules inside, ensure proper cooling.

7. Compliance/Regulation in India

   • Using mobile gateways in India may require regulatory compliance or operator approval (e.g., SIM usage, call termination, SMS regulations).

   • Verify compatibility with Indian mobile operators and that the device allows using approved SIMs, and supports Local MNP regulations if needed.

8. Vendor Support, Warranty & Firmware Updates

   • Ensure Dasscom (or its Indian distributor) offers local support, firmware upgrades for LTE/VoLTE bands, and spares for modules if one fails.

   • Warranty and support terms (1-year, 3-year) must be clarified.