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Apr 2001
SC
TM
V0I.01
Minimum CSU Requirements for SC 4812ET BTS
Network Interface:
– Line Impedance: 120 Ohms (75 Ohms may require external adapter)
– Compliance: Per ITU–T G.703
Regulatory – International:
Safety: For a CSU external to the SC 4812ET, the requirement is to be
an certified CSU, with testing performance by a National Certification
Body (NCB) participating in the CB scheme under IEC60950.
Additional compliance requirements unique to E1 are not know at this
time. No additional compliance–testing specific to E1 has been
completed. The User is responsible to ensure that the chosen unit
complies with local regulatory requirements.
Cable Connections:
The cables necessary to connect to the CSU are pre–installed in the SC
4812ET frames. There are three (3) types of connections: network
interface (to the punch block of the BTS), terminal interface (to the GLI
board inside the BTS), and power. The pinout for the cables is given in
Table G-1, Table I-2, and Table I-3.
Table I-1: Network Interface (8–pin RJ48C Connector)
Pin#
1
RxD data (T1)
2
RxD data (R1)
4
TxD data (T)
5
TxD data (R)
7,8
Optional Shield
3,6
No Connection
Table I-2: Terminal Interface (8–pin RJ48C Connector)
Pin#
1
RxD data (T1)
2
RxD data (R1)
4
TxD data (T)
5
TxD data (R)
7,8
Optional Shield
3,6
No Connection
4812ET RF and Power Cabinet Hardware Installation Manual
Circuit Name
Circuit Name
DRAFT
– continued
I
187
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