Motorola SC 4812ET RF Hardware Installation Manual page 186

Minimum CSU Requirements for SC 4812ET BTS
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186
T1 Span Requirements:
– Nominal Line Rate: 1.544 Mbps
– Line Impedance: 100 Ohms
– Line Code: AMI or B8ZS
– Framing Format: SF or ESF per ANSI T1.403, ITU–T G.704
Terminal Interface:
– Shorthaul: ANSI T1.102, ITU–T G.703
– Input: DSX–1 to –10 dB
– Output: DSX–1 with equalization up to 655 feet.
Network Interface:
– Longhaul: ANSI T1.403, ITU–T G.703
– Input: DSX–1 to –27.5 dB
– Output: Per ANSI T1.403 with line build–out to 15 dB.
Lightning Protection:
Withstands lightning surges defined per FCC Part 68 and recovers (see
note below)
Regulatory – Domestic USA:
– FCC Compliance: Part 68, Part 15, Class B (see note above)
– Safety: UL1950: For a CSU external to the SC 4812ET, the
requirement is to be an approved CSU, with testing performance by
an NRTL (e.g. Underwriters Laboratories, CSA, ETL). For a CSU
which is to be fitted inside the SC 4812ET, ONLY UL listing is
acceptable.
Recommended:
Compliance to the requirements of Bellcore GR–1089.
E1 Span Requirements:
– Nominal Line Rate: 2.048 Mbps
– Line Code: AMI or HDB3
– Framing Format: Per ITU–T G.704
Terminal Interface:
– Line Impedance: 120 Ohms
– Compliance: Per ITU–T G.703
SC 4812ET RF and Power Cabinet Hardware Installation Manual
TM
NOTE
Part 68 compliance on any chosen unit must be tested as
part of the whole system, including cabling and punch
block external interface. The user is responsible for this
certification on any unit other than the Motorola supplied
CSU.
DRAFT
Apr 2001
V0I.01