Cisco Systems ATM Interface, Network Synchronization, IGX 8 Installation Manual, Release

ATM Interface

Type of Service:

Interface Types:

Data Rates:

ATM Layer:

Cell Rate:

Adaptation Layer:

No. of Ports per card:

No. of PVCs per card:

VPI Addressing Range:

VCI Addressing Range:

Traffic Queues:

Management Protocol:

Permanent Virtual Circuit (PVC)

User-to-Network (UNI) and Network-to-Network (NNI) per ITU I.361 and I.363

T3 or E3

Physical Layer Convergence Protocol per AT&T publication TA-TSY-00772 and 000773 for T3; ITU I-361 with HEC for E3

96,000 cells/sec. for T3, 80,000 cells/sec. for E3

AAL5

4

255

0–255

0–65535

CBR, VBR, and ABR

Interim Layer Management Interface (ILMI)

Network Synchronization

External Clock Sources:	The IGX switch synchronizes to the nearest, highest-stratm clock available.
	Any T1, E1, T3, E3, OC3 (STM-1) line, trunk, or optional external clock
	inputs can serve a clock source.
Internal to Node Source:	T1: 1.544 MHz, ± 10 ppm (stratm 4)
	E1: 2.048 MHz, ± 10 ppm (stratm 4)
Clocking Hierarchy:	Dynamic primary, secondary, and tertiary clocking
	Without a defined external clock reference, the IGX defaults to its internal
	clock source.

-10IGX 8 Installation Manual, Release 8.2.0