Path Configuration

In this user interface, you can query and set the frame format of a channelized SDH interface.

Navigation Path

In the NE Explorer, select a board and choose Configuration > Interface Management > Path Configuration from the Function Tree.

Parameters

Table 1 Parameters for Path Configuration

Field

Value

Description

Object

For example, 4-MP1-1-CD1-1(Port-1)-VC4:VC12:1

Displays the objects configured for a path.

VC12 Frame Format

Unframe, Double Frame, CRC-4 Multiframe

Selects the VC12 Frame Format.

If VC12 Frame Format is set to Unframe, creation of the channelized CES service is not supported.

  • Double Frame: 32 bits form one G.704 basic frame. The double frame is a multiframe formed by two G.704 basic frames. The double frame is used for alignment.
  • CRC-4 Multiframe: 32 bits form one G.704 basic frame. The CRC-4 multiframe is formed by 16 basic G.704 frames, which is defined in G.706 standard. The CRC-4 multiframe carries the cyclical redundancy check (CRC) information and line monitoring information. In the case of the CRC-4 multiframe flow, align the frames in the double frame mode. After the frames are successfully aligned in the double frame mode, align the frames in the CRC-4 multiframe mode.
  • Unframe: The signals are continuous bit streams, which have no frame structure.

Frame Mode

30,31

Selects the VC12 Frame Mode.

CRC BER Threshold

1.0E-4, 5.0E-4, 1.0E-3, 5.0E-3, 1.0E-2, 1.0E-1, 3.0E-1

Indicates the BER of CRC packets on the VC12 path as follows:

  • 1.0E-4: 0.01 percent
  • 5.0E-4: 0.05 percent
  • 1.0E-3: 0.1 percent
  • 5.0E-3: 0.5 percent
  • 1.0E-2: 1 percent
  • 1.0E-1: 10 percent
  • 3.0E-1: 30 percent

VC11 Frame Format

Unframe, SF, ESF, ESF-JAPAN

Selects the frame format of VC11.

NOTE:

This parameter is available only when the Channel Mode of the board is VC11.

Loopback Mode

Non-Loopback, Inloop, Outloop

Sets loopback mode.

UNI AIS Insertion

Enabled, Disabled

When a PTN device is connected to a BTS or BSC by channelized STM-1 links, no link alarm is reported even if an intermediate REG device is found or lines are misconnected on either end. It is difficult for users to detect line misconnection. If AIS insertion is enabled on the UNI or NNI ports of the PTN device, the BTS or BSC will be able to detect service alarms, which helps users determine whether lines are misconnected, whether loopback occurs, and whether network configurations are incorrect. Then users can modify configurations and connections in a timely manner to ensure service continuity.

NOTE:
  • UNI AIS Insertion and NNI AIS Insertion cannot be both enabled.
  • The NNI port carries CES services. NNI AIS Insertion can be successfully set only after Enable CES Service Alarm Transparent Transmission in the Configuration > CES Service Management is set to Enabled.

NNI AIS Insertion

Enabled, Disabled

Re-timing Mode

Master Mode, Slave Mode

The Re-timing Mode parameter indicates whether the port uses the internal clock or the line recovery clock as the working clock.

  • Master Mode:Indicates that the port uses the internal clock as the working clock.
  • Slave Mode:Indicates that the port uses the line recovery clock as the working clock.
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