PEF81902FV1.1 Lantiq, PEF81902FV1.1 Datasheet - Page 72

• Manufacturer Part Number: PEF81902FV1.1
• Manufacturer: Lantiq

Specifications of PEF81902FV1.1

• Lead Free Status / RoHS Status: Supplier Unconfirmed

2.4
The statemachine of the U-Transceiver is compatible to the NT state machine in the PEB
8090 documentation [9], but includes some minor changes for simplification and
compliance to Ref. [1].
The U-transceiver is configured and controlled via the registers described in
The U-transceiver is always in IOM
2.4.1
The 4B3T U-interface performs full duplex data transmission and reception at the U-
reference point according to ETSI TS 102 080 and FTZ 1TR 220. It applies the 4B3T
block code together with adaptive echo cancelling and equalization. Transmission
performance shall be such, that it meets all ETSI and FTZ test loops with margin.
The U-interface is designed for data transmission on twisted pair wires in local telephone
loops, with basic access to ISDN and a user bit rate of 144 kbit/s.
The following information is transmitted over the twisted pair:
• Bidirectional:
• From LT to NT side:
• From NT to LT side:
Performance Requirements according to FTZ 1 TR 220 (August 1991):
On the U-interface, the following transmission ranges are achieved without additional
signal regeneration on the loop (bit error rate
• with noise
• without noise
Note: Typical attenuation of FTZ wires of 0.4 mm diameter is about 7dB/km in contrast
The transmission ranges can be doubled by inserting a repeater for signal regeneration.
Performance requirements according to ETSI TS 102 080 are met, too.
1 ms frames are transmitted via the U-interface, each consisting of:
Data Sheet
– B1, B2, D data channels
– 120 kHz Symbol clock
– 1 kHz Frame
– Activation
– 1 kbit/s Transparent Channel (M symbol), (not implemented)
– Power feeding
– Deactivation
– Remote control of test loops (M symbol)
– Indication of monitored code violations (M symbol)
to ETSI wires of 0.4 mm with about 8dB/km.
U-Transceiver
4B3T Frame Structure
4.2 km on wires of 0.4 mm diameter and
5 km on wires of 0.4 mm diameter and
â
-2 channel 0.
58
10
-7
):
8 km on 0.6 mm wires
10 km on 0.6 mm wires
Functional Description
PEF 81902
Chapter
2001-11-12
4.