Release ledger
Canonical Atlas record
TS 11.21
Base Station System (BSS) equipment specification; Radio aspects
Release evolution
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Use indexed version, Work Item and Change Request evidence to see what changed around this specification. This is an evidence trail, not a clause-by-clause normative diff.
Rel-99 snapshot
Work affecting this release
0 indexed Change Requests · 7 connected Work Items.
Showing 12 CR records from the available cross-release sample. Browse release CR records (JSON) →
CR A135 rev.1 — Modification of complete conformance, AM suppression
CR A162 — Performance requirements for E-TCH/F32.0
CR A161 — Alignment of receiver requirements with TS 05.05
CR A159 — Clarification of requirements for BSS IM attenuation for GSM 850 and PCS 1900
CR A157 rev.1 — Correction to reference interference performance requirements
CR A157 — Correction to reference interference performance requirements
CR A156 — Correction of requirements for PDTCH/CS-4 C/Ic
CR A142 — Relaxation of Power versus time
CR A141 rev.1 — Intermodulation Test Method for MXM-850/1900
CR A139 rev.1 — BTS output power capability and requirements with 8PSK
CR A138 — Change of referenced specification for test site requirements for Radiated Spurious Emissions, Base Station testing
CR A137 rev.2 — Additions to facilitate test on MXM systems
Version history
Indexed versions
Showing 45 of 45 indexed versions.
Atlas classifications
Meaning and provenance
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Work Items
Standards work connected to TS 11.21
Enhanced Data rates for GSM Evolution
General Packet Radio Service
General Packet Radio Service enahancements
Historical association · verification pendingGSM_400
Mandatory speech codec for narrowband telephony service
Historical association · verification pendingOAM Principles and High-level Requirements
Historical association · verification pending(Small) Technical Enhancements and Improvements for R99
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Related standards
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