Documentation
SAT>IP URL Builder & T2-MI Configuration
Quick reference guide to SAT>IP URL construction, multistream parameters, and T2-MI configuration
- 2026-03-19 14:57
- 2026-03-26 14:34
Quick reference guide to SAT>IP URL construction, multistream parameters, and T2-MI configuration
Basic SAT>IP Parameters
Essential parameters for standard DVB-S/S2 transponders
Essential Parameters
| Parameter | Description | Example Values |
|---|---|---|
| freq | Frequency in MHz | 10700-12750 (Ku-band) |
| pol | Polarization | V (Vertical) or H (Horizontal) |
| sr | Symbol Rate in kSym/s | 22000, 27500, 30000 |
| msys | Delivery system | DVBS, DVBS2, DVBT, DVBT2 |
| mtype | Modulation | qpsk, 8psk, 16apsk, 32apsk, 256apsk |
| fec | Forward Error Correction | 12 (1/2), 23 (2/3), 34 (3/4), 45 (4/5), 56 (5/6), 89 (8/9), 910 (9/10) |
http://your-satip-server-ip:8875/?src=1&freq=11727&pol=v&sr=30000&msys=dvbs2&mtype=8psk&fec=34FEC Notation: Two digits represent numerator/denominator. 34 = 3/4, 910 = 9/10. Higher FEC (8/9, 9/10) = more bandwidth but requires stronger signal. Lower FEC (1/2, 2/3) = more error protection but uses bandwidth less efficiently.
Multistream Parameters
ISI & PLS codes for DVB-S2X multistream
ISI (Input Stream Identifier)
- Range: 0-255
- Selects a stream from a multistream transponder
- Example:
isi=9 - Eutelsat 5W: ISI=1 (RAI mux), ISI=9
- 31+ channels on one frequency
PLS (Physical Layer Scrambling)
- PLSC range: 0-262143
- Modes: gold, root, combo
- Example:
plsc=131070&pls=gold - Use either ISI or PLSC, not both
- Check LyngSat for correct values
http://your-satip-server-ip:8875/?src=1&freq=12536&pol=h&sr=35300&msys=dvbs2&mtype=8psk&fec=23&isi=9Example: Eutelsat 5 West B 12.536 GHz H carries multiple streams. Stream 9 (ISI=9) contains 17 Puglia local channels. Total: 31+ channels on one frequency.
T2-MI Configuration
DVB-T2 encapsulated in DVB-S2
T2-MI Parameters
- T2MI PID: Default 4096 (range: 4095-4099)
- T2MI PLP: Default 0 (range: 0-255)
- Most transponders use PID 4096
- PLP 0 = main multiplex
- Check LyngSat for specific values
Important Notes
- SATLINE SAT>IP Server Pro does NOT decapsulate T2-MI
- Provides raw T2-MI stream
- Requires external decapsulation software
- Only use if the transponder uses T2-MI
- Adding T2-MI parameters to a non-T2-MI transponder will cause failure
http://your-satip-server-ip:8875/?src=1&freq=11727&pol=v&sr=30000&msys=dvbs2&mtype=8psk&fec=34&pids=all#t2mi=4096&plp=0Workflow: Get the full transponder stream using pids=all, then use external T2-MI decapsulation software (Astra-SM, T2-MI Analyzer) to extract DVB-T2 content. Most residential users will never need T2-MI — it’s primarily for professional broadcast engineers.
Complete URL Examples
Real-world scenarios
Example 1: Standard DVB-S2
Astra 19.2°E, 11.954 GHz H, 27500 kSym/s, 8PSK 3/4
http://your-satip-server-ip:8875/?src=1&freq=11954&pol=h&sr=27500&msys=dvbs2&mtype=8psk&fec=34&pids=allExample 2: Multistream with ISI
Eutelsat 5W, 12.536 GHz H, 35300 kSym/s, 8PSK 2/3, ISI=9
http://your-satip-server-ip:8875/?src=1&freq=12536&pol=h&sr=35300&msys=dvbs2&mtype=8psk&fec=23&isi=9&pids=allExample 3: Multistream with PLS
Hotbird 13°E, 11.470 GHz V, 27500 kSym/s, 8PSK 3/4, PLS Gold 131070
http://your-satip-server-ip:8875/?src=1&freq=11470&pol=v&sr=27500&msys=dvbs2&mtype=8psk&fec=34&plsc=131070&pls=gold&pids=allExample 4: T2-MI
T2-MI encapsulated, 11.727 GHz V, 30000 kSym/s, 8PSK 3/4, PID 4096, PLP 0
http://your-satip-server-ip:8875/?src=1&freq=11727&pol=v&sr=30000&msys=dvbs2&mtype=8psk&fec=34&pids=all#t2mi=4096&plp=0Troubleshooting Tips
Common issues & solutions
Common Mistakes
- Wrong frequency (check LyngSat)
- Incorrect polarization (V vs H)
- Symbol rate typo (27500 vs 2750)
- FEC mismatch (34 vs 23)
- Adding T2-MI parameters to a non-T2-MI transponder
- ISI/PLS confusion
- Wrong PLS mode (gold vs root)
Diagnostic Steps
- Verify with LyngSat.com
- Start with basic parameters
- Test without PID filtering
- Increase duration to 20 seconds
- Check SATLINE.TV admin panel
- Try alternative ISI values
- Consult satellite forums
⚠️ Signal Quality: Advanced modulation (16APSK, 32APSK, 256APSK) and high FEC ratios (8/9, 9/10) require excellent signal quality. Check SNR and signal strength in the SATLINE monitoring dashboard.
Gleb Sazanov
Team member
Gleb Sazanov is an accomplished Chief Technology Officer (CTO) with over 20 years of experience in software development, system architecture, and cloud-based solutions. As the CTO of SATLINE, a leading provider of virtual and colocation services tailored to SATCOM businesses, Gleb drives the company’s technological strategy, fostering innovation and efficiency in data center services. His expertise spans various domains, including DevOps, system scaling, and high-performance infrastructure management. With a deep passion for cutting-edge technologies, Gleb plays a pivotal role in shaping the future of the SATCOM industry.