Reason why TOA boards support channel loopbacks only in ODU1_ODU0 mode

4

When the TOA board works in a mode rather than the ODU1_ODU0 mode, the service mapping path is ANY->ODU0 or ANY->ODU1. Similar to other line boards in this scenario, the TOA board supports only one channel of ODUk signals and does not support ODUk channel loopbacks. When the TOA board works in ODU1_ODU0 mode, the service mapping path is OTU1->ODU1->ODU0 (two channels of ODUk signals are supported). In this scenario, a channel loopback can be performed for the two channels of ODUk signals.

Other related questions:
Channel loopback
A channel loopback loops back a single ODUk signal rather than signals of an entire board. A channel loopback on one service does not affect other services on the same board. It is used to check whether an ODUk signal sent from a tributary board is normal and whether the line board can properly process this ODUk signal.

Whether the THA and TOA boards support tributary-line mode
No. The THA and TOA boards do not support tributary-line mode. Only the TOM board supports tributary-line mode.

Reason why the Fibre Channel switches must be configured in stacking mode
You can know the reason why the Fibre Channel switches must be configured in stacking mode by going to the FAQ-Why must the Fibre Channel switches be configured in stacking mode website.

Types of services supported by TOA boards
TOA boards support the following types of services: FE: Ethernet service at a rate of 125 Mbit/s. GE: Ethernet service at a rate of 1.25 Gbit/s, supporting GE optical signals and electrical signals. OTU1: OTN services at the rate of 2.67 Gbit/s. STM-1/OC-3: SDH/SONET service at a rate of 155.52 Mbit/s. STM-4/OC-12: SDH/SONET service at a rate of 622.08 Mbit/s. STM-16/OC-48: SDH/SONET service at a rate of 2.5 Gbit/s. FC100: SAN service at a rate of 1.06 Gbit/s. FC200: SAN service at a rate of 2.12 Gbit/s. FC400: SAN service at a rate of 4.25 Gbit/s. FICON: SAN service at a rate of 1.06 Gbit/s. FICON Express: SAN service at a rate of 2.12 Gbit/s. FICON4G: SAN service at a rate of 4.25 Gbit/s. SDI: digital TV service at a rate of 270 Mbit/s. HD-SDI: high-definition digital TV service at a rate of 1.49 Gbit/s. HD-SDIRBR: high-definition digital TV service at a rate of 1.49/1.001 Gbit/s. 3G-SDI: high definition video services at the rate of 2.97 Gbit/s. 3G-SDIRBR: high-definition digital TV service at a rate of 2.97/1.001 Gbit/s. DVB-ASI: digital TV service at a rate of 270 Mbit/s. ESCON: SAN service at a rate of 200 Mbit/s. FDDI: SAN service at a rate of 125 Mbit/s.

Cause why TOA provides 16 ClientLP ports but supports only 8 ODU0 services in ODU0 non-convergence mode
It is normal. The 32 ClientLP ports on the client side of a TOA board are mainly used when the TOA board is interconnected with a TOM board. If the first logical port of the TOM board uses channel 1, its second logical port can use only channel 2. When the TOA board is interconnected with the TOM board, the two boards must use the same channel. For example, if the TOM board uses channel 2, the TOA board must also use channel 2; otherwise, services will become abnormal. Therefore, two channels are designed for the TOA board in ODU0 non-convergence mode.

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top