Siemens BS-240 Technical Description page 11

Information
Base Station System
A30808-X3247-L14-2-7618
Redundancy:
– SW Support of Core Redundancy
– SW Support of BCCH Redundancy
– AC/DC n+1 redundancy. (n+1) AC/DC Converters work in load sharing, but n AC/DC
are able to supply the whole BS-240/241 including Service Racks/Shelters
Abis interface:
– Enhanced Full-Rate TCH
– Full-Rate and Half-Rate TCH
– AMR TCH
– Submultiplexing 4 x 16 kbit/s onto one 64 kbit/s timeslot for handling Full-Rate TCH
on Um interface
– Handling of 4x(2x8) kbit/s onto one 64 kbit/s timeslot for half-rate TCH on Um inter-
face
– Drop and insert feature on 2 Mbit/s (E1) and 1.5 Mbit/s (T1) links is available on a
16 kbit/s and a 64 kbit/s basis
– Star, loop and multidrop chain connections
– Cross connect function
– Change of PCM line configuration from star to multidrop or loop and vice versa is
possible without any interruption of service
– Multiple Abis LAPD links; load sharing and LAPD fault recovery
– External clock synchronisation
– Over-Voltage Protection with OVPT
Abis link media:
– Wire
– Fiber optic
– Micro-Wave
Fault procedures:
– Automatic Recovery procedure of faulty objects in BTS
– Online RF Loopback
Technical Description (TED:BSS)
BS-240/241
11