
Network functional principles
z
Services to be internationally compatible
z
UNI standardised so that TE is portable
z
Standardise network capability
High Layer
Low Layer
Operation & manage
Layer 1: Physical layer connection activation deactivation, bit transmission
channel structure mutiplex.
Layer 2: Data link connection establishment, Data link congestion handling
How control, error, sequence control, frame sync.
Jamadagni H S DC/V1/2004 12
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