NetGSM

Preset for NetGSM, a widely used Turkish SIP provider. This setup has been confirmed with live calls.

Values are taken one-to-one from the product’s telephony preset (sip_presets.py). Check any field marked Not verified in the docs in your provider’s panel; it stays editable in the console with the same note.

Provider key

netgsm_sip

Region

Türkiye (national numbers)

Connection test

SIP REGISTER

Username

Your number without the leading 0 (e.g. 8503465275)

Caller ID (DID)

Like 0850 346 52 75

Preset values

These values are pre-filled in the console; you can change every one of them.

Field	Default	Status
SIP server	sip.netgsm.com.tr	✓ Verified
Transport	UDP	! Not verified in the docs
Authentication	username / password (Digest)	✓ Verified
Dialled number format	national	✓ Verified
Inbound signalling IPs	— (none published)	! Not verified in the docs
Suggested codecs	PCMA, PCMU	! Not verified in the docs
SIP REFER (transfer)	unknown — use bridge	! Not verified in the docs

Provider notes

SIP details: NetGSM panel → Voice Service → Settings → SIP Details. The username is your number without the leading 0 (e.g. 850XXXXXXX). NetGSM's guides use TCP; UDP works too. For inbound calls, set up 'SIP Trunk forwarding' at NetGSM to the IP of your LiveKit SIP server. Transfer to a PBX (REFER) isn't documented: use the 'bridge' method for transfers to a number.

Sources

• bilgibankasi.netgsm.com.tr/yapay-zeka-cagri-entegrasyonlari/vapi-ile-yapay-zeka-cagri-entegrasyonu
• bilgibankasi.netgsm.com.tr/yapay-zeka-cagri-entegrasyonlari/elevenlabs-netgsm-entegrasyonu
• bilgibankasi.netgsm.com.tr/sabit-telefon/sip-trunk-yoenlendirme-hizmeti

Connecting

1. In Settings → Integrations → Phone line, pick NetGSM as the provider. The preset fills in the fields.
2. Enter the SIP username, password (write-only) and caller number (DID); change the server, transport or number format if needed.
3. Press Test connection. Then map your inbound numbers to an assistant. Number mapping →