Maxim DS33Z41 Especificaciones descargar pdf (Pagina 18)

transmitted between two TDMoIP edge devices. Sometimes, a bundle can be called a pseudowire.

Q4. I am getting bit errors with the DS34T108 in E1 internal mode when I use all 8 ports. All

other modes operate correctly. What is the cause of these errors, and is there a solution?

A4. The A1 version of the DS34T108 does have issues when transmitting data on all 8 ports in E1 mode. The problem has

to do with the internal TDM framer of the device—there is a bandwidth issue with the internal synchronizer. An oscillator

that is specific to the framer is used to drive a state machine that checks each port to see if there is data ready to be

processed. When using all 8 ports, this oscillator is a little slower than required in E1 mode. However, T1 does not have

an issue, as its fundamental frequency is 1.544MHz, as opposed to 2.048MHz in E1 mode.

Fortunately, there is a test mode that increases the frequency of the internal oscillator to a value that can handle the

bandwidth for all 8 ports in E1 mode. Simply write a value of 0x71 to the register offset 0x109100 in the internal framer.

This value will not need to be written to this location for subsequent revisions of the DS34T108.

Q5. What kind of OAM packets are supported by TDMoP product support?

A5. OAM (operations, administration, and maintenance) is a general term used to describe the processes, activities, tools,

standards, etc. involved with operating, administering, and maintaining any system.

Maxim TDMoP products support the following three types of OAM packets:

1. UDP/IP-specific OAM packets: Match between the packet's bundle identifier and one of the values (up to 8

different) configured in the OAM ID configuration registers.

2. VCCV OAM packets (inband performance monitor): A 1- to 16-bit value is created according to the combination of

the control_word_oam_mask_n configuration register and the control_word_oam_value configuration register. An

OAM packet is identified when there is a match between this value and the control word (31:16) bits. Such a

match is taken into account only when the OAM_ID_in_CW bundle configuration bit is set.

3. MEF OAM packets: Match between the packet Ethertype and the Mef_oam_ether_type configuration register.

Q6. What is ARP and how does it work on Maxim TDMoP devices?

A6. The ARP (address resolution protocol) is a protocol used by the Internet Protocol (IP), specifically IPv4, to map IP

network addresses to the hardware addresses (Ethernet MAC address) used by a data link protocol. In other words, ARP

provides a dynamic mapping from an IP address to the corresponding hardware address.

0 8 15 16 31

Hardware Type Protocol Type

Hardware Size Protocol Size Operation

Sender Hardware Address (Octets 0 to 3)

Sender Hardware Address (Octets 4

to 5)

Sender IP (Octets 0

to 1)

Sender IP (Octets 2 to 3)

Target Hardware

Address (Octets 0

to 1)

Target Hardware Address (Octets 2 to 5)

Target IP (Octets 0 to 3)

Hardware Type: Specifies a hardware interface type (e.g., Ethernet) for which the sender requires a response.

Protocol Type: Specifies the type of network-level protocol address (e.g., IP) the sender has supplied.

Hardware Size: The size in bytes of the hardware address. For Ethernet, it is 6.

Protocol Size: The size in bytes of the protocol address. For IP, it is 4.

Operation: What kind of operation is the message for? ARP request: 1, ARP reply: 2.

Sender Hardware Address: The size in bytes of the sender's hardware address. For Ethernet, it is 6.

Sender IP: The size in bytes of the sender's IP address. It is 4.

Target Hardware Address: The size in bytes of the target's hardware address. For Ethernet, it is 6.

Target IP: The size in bytes of the target's IP address. It is 4.

Page 18 of 22

1 2 ... 13 14 15 16 17 18 19 20 21 22

Comentarios a estos manuales

Sin comentarios

Maxim DS33Z41 Especificaciones Pagina 18

Comentarios a estos manuales

Relacionado con productos y manuales para Redes Maxim DS33Z41