SIST EN 300 238 V1.3.1:2005

SIST EN 300 238 V1.3.1:2005 is a SIST publication of the ETSI European Standard for Private Integrated Services Network (PISN) inter-exchange signalling. It specifies the signalling protocol at the Q reference point for the Name identification supplementary service, supporting Calling Name Identification Presentation (CNIP) and COnnected Name identification Presentation (CONP) in PSS1, also known informally as QSIG. It is aimed at equipment implementers and network integrators who need interoperable name presentation across PISN exchanges.

What does SIST EN 300 238 V1.3.1:2005 specify?

SIST EN 300 238 V1.3.1:2005 specifies the protocol support for carrying name identification information between PISN exchanges. The document is a modified endorsement of ISO/IEC 13868 (2003), so it keeps the international baseline while applying ETSI-specific changes for use in the PISN/PSS1 environment.

The scope statement highlights three technical updates in this version: UNICOD name coding, ASN.1 migration, and a new procedure for delayed sending of Name information. In practice, these are the items implementers need to align in protocol handling, message encoding, and timing of name delivery.

What are the key requirements of SIST EN 300 238 V1.3.1:2005?

SIST EN 300 238 V1.3.1:2005 defines how the Name identification supplementary service is signalled at the Q reference point. That matters because interoperability depends on both ends using the same signalling behaviour when a name is presented or connected.

Service support and protocol context

The standard places the Name identification supplementary service inside the PSS1 protocol family, informally known as QSIG. It states that the protocol supports CNIP and CONP, so implementers need to verify the service behaviour in both presentation cases.

Documented changes in this version

The scope explicitly states three changes:

• introduction of UNICOD name coding
• ASN.1 migration
• new procedure for delayed sending of Name information

These changes affect how name data is encoded and when it is sent, so they are the main points to check during implementation and interoperability testing.

Normative references and replacement of references

Clause 3 is modified to insert new normative references and to replace references throughout ISO/IEC 13868 with ETSI equivalents. This is important because the Name identification service depends on companion standards for basic services, bearer services, reference configuration, and related supplementary services.

Editorial and reference handling rules

Clause 3 also states how references are treated - specific references stay tied to the cited edition, while non-specific references use the latest version. For implementers, that affects which companion documents are valid when resolving procedures and message formats.

What terms does SIST EN 300 238 V1.3.1:2005 define?

• PISN - Private Integrated Services Network, the network environment for which the standard is written.
• Q reference point - the inter-exchange interface where the signalling protocol is used.
• CNIP - Calling Name Identification Presentation, the service for presenting a caller name.
• CONP - COnnected Name identification Presentation, the service for presenting the connected name.
• PSS1 - the protocol family that carries the service; the document says the protocol forms part of PSS1.
• QSIG - the informal name used for PSS1 in this context.
• ASN.1 - the data-description notation referenced by the migration update in this version.
• UNICOD - the name coding introduced in this version for name information handling.

Who uses SIST EN 300 238 V1.3.1:2005?

SIST EN 300 238 V1.3.1:2005 is used by telecom equipment vendors, PBX and network system designers, and protocol implementers working on PISN inter-exchange signalling. It is also relevant to test engineers and integrators who need to verify CNIP and CONP behaviour across connected systems.

Quality and conformity teams use it to check whether a product follows the correct QSIG/PSS1 signalling behaviour and uses the right companion standards. Buyers and technical evaluators use it to confirm that a product supports the name identification service expected in a PISN environment.

What changed in SIST EN 300 238 V1.3.1:2005 from the previous edition?

SIST EN 300 238 V1.3.1:2005 replaces earlier ETS 300 238 editions listed in the history note. The version highlights three technical updates: UNICOD name coding, ASN.1 migration, and a new delayed-sending procedure for Name information. The document history also shows the progression from the 1993 and 1995 editions to the 2003/2004 V1.3.1 publication.

Which standards are used with SIST EN 300 238 V1.3.1:2005?

Clause 3 adds these normative references and companion standards:

• ETSI EN 300 172 - provides circuit-mode basic services for inter-exchange signalling.
• ETSI EN 300 171 - provides circuit-mode 64 kbit/s bearer services and related functional capabilities.
• ETSI ETS 300 475-1 - gives the reference configuration for PTN eXchanges (PTNXs).
• ETSI EN 300 239 - defines the generic functional protocol for supporting supplementary services.
• ETSI EN 300 237 - covers the functional model and information flows for name identification supplementary services.
• ETSI EN 300 261 - covers call transfer supplementary service signalling.
• ETSI EN 300 257 - covers call diversion supplementary service signalling.

These documents provide the surrounding service and protocol framework that the Name identification service relies on.

What does the SIST EN 300 238 V1.3.1:2005 document contain?

The document contains the ETSI foreword, an endorsement notice for ISO/IEC 13868 (2003), and the clause 3 text that replaces references and adds ETSI normative references. It also includes a reference-mapping table that swaps ISO/IEC identifiers for ETSI documents throughout the text. The front matter carries copyright and IPR notices, national transposition dates, and a short publication history.