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Figure 6. Typical MTIE graph with an MTIE mask.

Q10. How can the user send OAM packets using the DS34T108?

A10. OAM (operations, administration, and maintenance) is a general term used to describe the processes, activities,

tools, standards, etc. involved with operation, administration, and maintenance of any system.

PING and ARP are two examples of OAM packets. The main CPU is responsible for building the OAM packets and then

passing them to the DS34T108. The DS34T108 will subsequently send these OAM packets to the Ethernet interface.

The HAL driver for the DS34T108 provides an API interface to send OAM packets. The method for this API in 'AsicHal'

class is:

SendPacket(byte * i_PktHandle, byte *i_PktBuffer, word i_PktLen, byte *i_SendParams)

where:

i_PktHandle 0

i_PktBuffer A pointer to the OAM packet that needs to be built before a call is made to this method

i_PktLen Size in bytes of the OAM packet

i_SendParams Miscellaneous parameters that also needed to be filled before

Please see the SendArpReq method in 'OampTask' class for some examples.

Q11. How do you find the correct jitter buffer index for a bundle in Maxim TDMoP devices?

A11. The jitter buffer index is the concatenation of the TDM interface number (3 MSB, 0 to 7) and the number of the

lowest timeslot in the bundle. The lowest timeslot can be found in the bits[4:0] of bank 1 or 2 per the timeslot

assignment map (offset 0x18000 or 0x18200).

For example, if the bundle consists of timeslots (base 0) 10, 14, and 17 on the port 4, then the Jitter_buffer_index is

100_01010[bin], i.e., 0x8A. So, the correct Status_and_level registers of the jitter buffer controller with an offset set at

0x30000 will be:

0x30000 + (0x8A * 8) = 0x30450

The reason for multiplying by 8 is because every timeslot takes two 4-byte registers (Status_and_level register and

Min_and_max_levels register).

Q12. What are the external SDRAM memory maps for the DS34T10x and DS34S10x TDMoP

devices?

A12. The external SDRAM memory map for the DS34T10x and DS34S10x TDMoP devices are as follows:

Base address offset: 0x1000000.

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