SZ-DOC-W5-1.pdf LTU/NTU
Version: 1.5 Operating Manual
65 Revision: 2002-09-10
7.3.4.5 MODE Command
The MODE command sets the 1p, 2p, 3p and 4p operation between LTU and NTU.
MODE 1: 1p operation enabled
MODE 2: 2p operation enabled
MODE 3: 3p operation enabled
MODE 4: 4p operation enabled
In 3p and 4p mode the Pair Identification has to be taken into account
Operation Specification Rate
Max data rate of E1 user interface 32 x 64kbit/s
Max data rate of nx64 user interface 96 x 64kbit/s
Max user data rate per pair 36x64kbit/s
3p operation
Pair Identification and Cabling No restrictions
Max data rate of E1 user interface 32 x 64kbit/s
Max data rate of nx64 user interface 96 x 64kbit/s
Max user data rate per pair Pair A&B: 30 x 64 kbit/s
Pair C&D: 18 x 64 kbit/s
4p operation
Pair Identification and Cabling Free pair cabling for data
rates up to 72 x 64 kbit/s
Pair crossing A⇔B, C⇔D
allowed for higher data
rates,
Pair crossing AB⇔CD
prohibited, PID alarm will
show up
Table 7-2: 3p and 4p limitations
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