Protocols
The current version of Argos supports the following TETRA (Terestrial Trunked Radio) protocol stack:
Tetra Air Interface: 
- ETSI 300 392-1 – Voice + Data, Part 1: General Design – v1.4.0 (2008-7)
- ETSI 300 392-2 – Voice + Data, Part 2: Air Interface – v3.5.1 (2011-10) - with Tetra TEDS
- ETSI 300 392-7 – Security – v3.2.0 (2010-02)
- ETSI 100 392-15 – Frequency bands, duplex spacing & channel numbering – v1.4.1 (2010-03)
- ETSI 100 392-18 – Location Information Protocol (Tetra LIP) – v1.4.1 (2008-07)
Tetra Speech:
- ETSI 100 392-3-6 – Speech format implementation for circuit mode transmission - v1.1.1(2003-12):
Inter System Interface (Tetra ISI):
- ETSI 300 392-3-1 – Voice + Data, ISI, General Design – v1.3.1 (2010-08)
- ETSI 300 392-3-2 – Voice + Data, ISI, Additional Network Feature - Individual Call (ANF-ISIIC) – v1.4.1 (2010-08)
- ETSI 300 392-3-3 – Voice + Data, ISI, Additional Network Feature - Group Call (ANF-ISIGC) – v1.3.1 (2011-11)
- ETSI 300 392-3-4 – Voice + Data, ISI, Additional Network Feature - Short Data Service (ANF-ISISDS) – v1.3.1 (2010-08)
- ETSI 300 392-3-5 – Voice + Data, ISI, Additional Network Feature – Mobility Management (ANF-ISIMM) – v1.4.1 (2010-06)
Supplementary Services (Tetra ISI):
- 300 392-12-22 – DGNA - Dynamic Group Number Assignment – v1.3.1 (2005-04)
- 300 392-12-3 – TPI - Talking Party Identification – v1.3.1 (2006-04)
- 300 392-12-11 – CW - Call Waiting – (2000-09)
- 300 392-12-21 – AL - Ambience Listening – v1.3.1 (2007-07)
- 300 392-12-1 – CI - Call Identification *
- 300 392-12-2 – CR - Call Report *
- 300 392-12-4 – CF - Call Forwarding *
- 300 392-12-5 – LSC - List Search Call *
- 300 392-12-6 – CAD - Call Authorized by Dispatcher *
- 300 392-12-7 – SNA - Short Number Addressing *
- 300 392-12-8 – AS - Area Selection *
- 300 392-12-9 – AP - Access Priority *
- 300 392-12-10 – PC - Priority Call *
- 300 392-12-12 – CH - Call Hold *
- 300 392-12-13 – CCBS - Call Completion to Busy Subscriber *
- 300 392-12-14 – LE - Late Entry *
- 300 392-12-16 – PPC - Pre-emptive Priority Call *
- 300 392-12-17 – IC - Include Call *
- 300 392-12-18 – BOC - Barring of Outgoing Calls *
- 300 392-12-19 – BIC - Barring of Incoming Calls *
- 300 392-12-20 – DL- Discreet Listening *
- 300 392-12-23 – CCNR - Call Completion on No Reply *
- 300 392-12-24 – CR - Call Retention *
- 100 392-18-3 – DOTAM - Direct mode Over The Air Management*
The SS protocols marked with (*) are partially decoded (SS protocol identifier only). To be completed in next releases.
ISDN (Integrated Services Digital Network):
- Q.921 – LAPD - Link Access Protocol on D-Channel
- Q.931, Q.932 – QSIG (DSS1/PSS1) - Digital/Private Signalling System 1
- ROSE, ITU X.229 – Remote Operation Service Element, ASN.1 encoded
IP (Internet Protocol) and Ethernet: 
- Ethernet
- VTP – VLAN Trunking Protocol
- IP – Internet Protocol version 4
- UDP – User Datagram Protocol
- TCP – Transmission Control Protocol
- ICMP – Internet Control Management Protocol
- IGMP – Internet Group Management Protocol
- SCTP – Stream Control Transmission Protocol
- RTP – Real-Time Transmission Protocol
PPP (Point-to-Point Protocol):
- RFC 1661, RFC 1172, RFC 1172 – LCP - Link Control Protocol
- RFC 1172 – IPCP - Internet Protocol Control Protocol
- RFC 1344 – PAP - Password Authentication Protocol
- RFC 1944 – CHAP - Challenge Handshake Authentication Protocol
Other:
- ETSI 301 347 – GTP - GPRS Tunneling Protocol – v7.5.1 (2000-12)
Popular tags: Tetra TEDS, Tetra 2, Tetra PMR, Tetra Protocol Stack, Tetra Services, Tetra Packet Data, Tetra IP