An AT6 board transmits/receives and processes six-channel analog
voice signals or E&M signaling, and provides alarms and events
for maintenance.
Table 1 provides the functions and features supported by an AT6
board.
Table 1 Functions and features supported by an AT6 board
| Function and Feature | Description |
|---|
| Basic functions | Supports the E&M trunk functions. An N1AT6 board supports only the 1E1M mode. An N2AT6 board supports
the 1E1M, 2E2M, reverse 2E2M modes. Supports 2-wire/4-wire audio signals. An N1AT6 board supports the setting of 2-wire/4-wire audio modes by
both setting DIP switches manually on the board and using the NMS.
An N2AT6 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 1.5, in steps of
0.5.
- 2-wire/4-wire audio port RX Gain (dB): -7.0 to 14.0, in steps of
0.5.
- E&M signaling:
- N1AT6 VER.A: supports the Bell type V E&M signaling.
- N1AT6 VER.B and N2AT6: support the Bell types I, II, III, IV, V and
SSDC5 E&M signaling.
NOTE:An AT6 board does not support E&M signaling of Bell types I,
III, and V when the NE uses UPM boards. An N2AT6 board supports the association of signaling and services. None: not associate. Signaling Reception: When the port reception status M wire is idle,
the audio services sent to the cross-connection side are invalid;
when the M wire is busy, the audio services are valid. Signaling Transmission: When the audio services received from the
cross-connect side are invalid, the port transmission status E wire
is idle; when the services are valid, the E wire is busy. Signaling Reception and Transmission: associates signaling with
services in both the receive and transmit directions. NOTE:When working in 2E2M mode, the board processes only the first
channel of E&M signaling, if signaling and services are
associated.
|
| Port | - External ports:
- N1AT6: DDN-1 to DDN-6, representing six external ports which always
use timeslot 1, with port IDs 1 to 6, respectively.
- N2AT6: an Anea 96 port, providing six logical ports each of which
consists of 10 wires, representing DDN-1 to DDN-6.
- Internal ports: 2M-1 to 2M-6, representing six E1 internal ports
that use timeslots 1-15 and 17-31, with port IDs 65 to 70,
respectively.
|
| Service processing | Transmits/Receives and processes six-channel 64 kbit/s signals. |
| 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.
|
The technical specifications of the AT6 include the interface
specifications, mechanical specifications, and power consumption.
Parameters Specified for Electrical Interfaces
Table 2 and Table 1 lists the parameters specified for the
electrical interfaces of the VER.A N1AT6 and VER.B N1AT6.
Table 1 Parameters specified for the electrical interfaces of the VER.B
N1AT6 board
Parameter | Value |
|---|
| Type of interface | RJ-45 |
| 2/4 wire | Channel bandwidth (Hz) | 300 to 3400 |
| Port Impedance (Ω) | 600 |
| TX Gain (dB) | -20 to 1.5, in steps of 0.5 Default value: -18.0 |
| RX Gain (dB) | -7.0 to 14.0, in steps of 0.5 Default value: -5.0 |
| Specifications of the interface | Complies with ITU-T G.711, G.712 |
| E&M | Type | Supports Bell I to V and SSDC5 types. Each type supports the
configuration of Signaling unit and Trunk circuit modes. |
| Voltage | -48V, -12V |
| 2E2M | Not Support |
Table 2 Parameters specified for the electrical interfaces of the VER.A
N1AT6 board
| Parameter | Value |
|---|
| Type of interface | RJ-45 |
| 2/4 wire | Channel bandwidth (Hz) | 300 to 3400 |
| Port Impedance (Ω) | 600 |
| TX Gain (dB) | -20 to 1.5, in steps of 0.5 Default value: -18.0 |
| RX Gain (dB) | -7.0 to 14.0, in steps of 0.5 Default value: -5.0 |
| Specifications of the interface | Complies with ITU-T G.711, G.712 |
| E&M | Type | Supports Bell V and SSDC5 types |
| Voltage | -48V |
| 2E2M | Not Support |
Table 3 lists the parameters specified for the Anea 96 interfaces
of the N2AT6.
Table 3 Parameters specified for the Anea 96 interfaces of the board
| Parameter | Value |
|---|
| Type of interface | Anea 96 |
| 2/4 wire | Channel bandwidth (Hz) | 300 to 3400 |
| Port Impedance (Ω) | 600 |
| TX Gain (dB) | -20 to 1.5, in steps of 0.5 Default value: -18.0 |
| RX Gain (dB) | -7.0 to 14.0, in steps of 0.5 Default value: -5.0 |
| Specifications of the interface | Complies with ITU-T G.711, G.712 |
| E&M | Type | Supports Bell I to V and SSDC5 types. Each type supports the
configuration of Signaling unit and Trunk circuit modes. |
| Voltage | -48V, -12V |
| 2E2M | Support |
Mechanical Specifications
The mechanical specifications of the AT6 are as follows:
- Dimensions (mm): 25.4 (W) x 235.2 (D) x 261.4 (H)
- Weight (kg): 0.75
Power Consumption
The maximum power consumption of the N1AT6 at room temperature
(25°C) is 15 W.
The maximum power consumption of the N2AT6 at room temperature
(25°C) is 15 W.
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