according your request(specially my friend MISHKA75)i share a amazing Doc about GEMINI. GEMINI Network Engineering Information
GSM/EDGE Migration Network Infrastructure
Features in GEMINI (in nutshell)Contents:
•Features supported in GEMINI
•BR features introduced to BSC 3i in GEMINI
•BSS features supported on BSxx with GEMINI
•BR features not supported with GEMINI
•BSS features not supported on BSxx with GEMINI
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