Whether there are restrictions on the number of TE links on an optical-layer ASON network or an electrical-layer ASON network

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On an optical-layer ASON network, a TE link can only be created between FIU boards. The quantity of TE links is determined by the NE scale of the network. Generally, only a few TE links are configured on the network.
On an electrical-layer ASON network, ODUk links of different levels can be created based on line board types. Generally, a large number of TE links are configured on the network. An electrical-layer ASON network has far more TE links than an optical-layer ASON network.
More links on a network will consume more network resources. Therefore, it is required that an electrical-layer ASON network be smaller than an optical-layer ASON network.

Other related questions:
Restrictions on a network for which both optical-layer ASON and electrical-layer ASON are configured
Optical-layer ASON and electrical-layer ASON can be configured on the same network but they cannot be configured on the same NE.

Principles for automatic discovery of electrical-layer TE links for ASON services
Electrical-layer TE links for ASON services are verified through electrical-layer overhead bytes. For the principles of automatic TE link discovery, see the ASON User Guide.

Whether OLP boards can be used in electrical-layer ASON
Huawei OTN ASON solution can be implemented in two ways: optical-layer ASON (OTN_O) and electrical-layer ASON (OTN_E). Optical-layer ASON achieves service grooming at the OCh wavelength level, while electrical-layer ASON achieves service grooming at the ODUk sub-wavelength level.

Number of preset restoration trails that can be configured for electrical-layer ASON
When the system resources are sufficient, two preset restoration trails can be configured for each ASON service.

Relationship between optical NEs and electrical NEs on an ASON network
When the optical and electrical NEs of an ASON NE are not split, the OTU or FIU boards on the ASON NE can function as edge points, and the related TE links can be automatically created when the boards are created. When the optical and electrical NEs are split, the multiplexer/demultiplexer or other optical-layer boards can function as the edge points of the optical NEs. When the fiber connections between the optical ports on the multiplexer/demultiplexer boards and those on the OTU boards are created, the intra-NE links that carry OCh signals are automatically created.

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