Cart 0 Product Products (empty)
No products
To be determined Shipping
$0.00 Total
Product successfully added to your shopping cart
Quantity
Total
There are 0 items in your cart. There is 1 item in your cart.
Total products
Total shipping To be determined
Total
New Reduced price! 
View larger
View larger 
ETSI TS 129 231
M00004953
New product
ETSI TS 129 231 Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Application of SIP-I Protocols to Circuit Switched (CS) core network architecture; Stage 3 (3GPP TS 29.231 version 9.1.0 Release 9)
standard by European Telecommunications Standards Institute, 04/01/2010
In stock