AT8

Basic functions

• Supports the E&M trunk functions in 1E1M, 2E2M, reverse 2E2M, and none modes.
• Supports 2-wire/4-wire audio signals. An AT8 board supports the setting of 2-wire/4-wire audio modes using the NMS.
  • 2-wire/4-wire audio port TX Gain (dB): -20.0 to 0.5, in steps of 0.5.
  • 2-wire/4-wire audio port RX Gain (dB): -7.0 to 13.0, in steps of 0.5.
• Supports the Bell types I, II, III, IV, V and SSDC5 E&M signaling.
  NOTE:

  An AT8 board does not support E&M signaling of Bell types I, III, and V when the NE uses APIU boards.

• Supports the association of signaling and services.
  • None: not to associate.
  • Signaling Reception: When the signaling reception status is idle, the audio services sent to the cross-connection side are invalid; when the signaling reception status is busy, the audio services are valid.
  • Signaling Transmission: When the audio services received from the cross-connect side are invalid, the signaling transmission status is idle; when the services are valid, the signaling transmission status is busy.
  • Signaling Reception and Transmission: associates signaling with services in both the receive and transmit directions.

Port

• External ports: an Anea 96 port, providing eight logical ports. Each logical port consists of eight wires, representing DDN-1 to DDN-8.
• Internal ports: 2M-1 to 2M-8, representing eight E1 internal ports that use timeslots 1-15 and 17-31, with port IDs 65 to 72, respectively.

Service processing

Receives/transmits and processes 2-wire/4-wire audio and E&M services.

Overhead processing

Supports the setting and query of the V5 and J2 bytes.

Alarms and events

Provides alarms and events for maintenance and fault locating.

Maintenance features

• Supports warm and cold resets. The warm reset does not affect services.
• Supports the query of the manufacturing information of the board.
• Supports board voltage detection and alarm reporting.
• Supports board temperature detection, alarm reporting, and performance statistics collection.
• Hot board swapping.

VC-12 SNCP

Supported.

E1 SNCP

Supported.

2M ASON

When working with TNZ5UXCMS, the board supports this function.