For ALCplus2 IDU equipment with expansion IduBoard Exp. 1 32E1 or IduBoard Exp. Nod. 2xSTM-1 2xSTM-16E2xSTM-1, a TDM matrix is available for the cross-connection of the E2xSTM-1 channels.
The number of E1 channels available for the connections changes depending on the type of equipment and on the equipped tributary streams. The detail is pointed out in Tab.2.
Connection Type
The TDM matrix manages the following types of connection:
• Tributary-Radio. Single connection between a tributary channel (E1 expansion/VC-12 STM-1/
E1 NBUS) and a radio E1 (Radio Permanent E1 or Radio Extra E1).
• Tributary-Tributary. Single connection between two different tributary channels (E1 expan-sion/VC-12 STM-1/E1 NBUS).
• Auto-Loop. Loop of a tributary channel (E1 expansion/VC-12 STM-1/E1 NBUS) or of a radio E1 channel (Radio Permanent E1 or Radio Extra E1).
In case of equipment without radio (radio unequipped - pag. 71), the connection of type Tributary-Radio is not available.
The TDM matrix can manage single and protected connections.
All the connections executed by the user are single connections.
Only exceptions are the connections (Tributary-Radio, Tributary-Tributary) involving a protected NBUS channel.
In this case, when the user executes a single connection, the matrix automatically executes the protection connections creating, as fact, a protected connection.
The protected Nodal Bus is available in ALCplus2 IDU equipment with expansion IduBoard Exp. Nod.
2xSTM-1 16E1 in protected nodal configuration.
Display of the cross-connections
The user can display the cross-connections existing in an equipment as graphic or as table.
In the first case, the tributary and radio streams are graphically displayed in a window (Cross Connection Manager window).
When a channel involved by a connection is selected, a line is displayed representing the connection. The edges of the line point out the channels composing the connection (Fig.13).
In the second case, a table is displayed with the list of the existing cross-connections.
Each row of the table represents a connection where the name, the edge channels and the connection type are pointed out (Fig.14).
Here below the operations which can be performed in the two displays:
• GRAPHICAL display (Cross Connection Manager window):
• To verify the connections of the equipment (one at a time)
• To execute a Tributary-Radio connection
• To execute a Tributary-Tributary connection
• To delete one or more connections
• To enable the loop of a channel (Auto-Loop)
• To disable an Auto-Loop
• To verify/modify the name of a connection
• TABLE display (List tab):
• To verify the connections of the equipment
• To delete one or more connections at the same time
• To verify/modify the name of the connections
Creation of a cross-connection
All the cross-connections in the TDM matrix must be created by the user (see pag.62, pag.63, pag.64).
It is possible to create a connection only in the graphical display (Cross Connection Manager window -Fig.11).
Manual deletion of the cross-connections
It is possible to delete one or more cross-connections from the graphical display of the connections or from the table display (pag.64).
In both cases, the connections removed in a type of display are automatically removed even from the other type.
Automatic deletion of the cross-connections
The following operations automatically delete the connections where the (tributary or radio) stream, object of the change, is terminated:
• Change of configuration of STM-1 stream (STM-1 Mode parameter - see pag.72). Passage from the:
• 1+0, 1+1 MSP, 2x(1+0) MST or 1+1 MSP No ALS option to None option and vice versa.
• 1+0, 1+1 MSP or 1+1 MSP No ALS option to 2x(1+0) option and vice versa.
• Change of configuration of TDM nodal Bus configuration (see pag.72):
• Parameter Node Type. Passage from ALCplus2 node option to No Nodal option.
• Parameter Number of TDM Elements. Passage from value 1÷8 to value 0.
• Parameter TDM Bus Protection. Passage from Not Protected option to Protected option and vice versa.
• Change of radio configuration (Eq RadioA Mode parameter - see pag.71).
Passage from 1+0, 1+1 Hot Standby or 1+1 Frequency Diversity option to Unequipped and vice versa.
• Change of configuration of E1 Radio - Permanent channels.
All those operations, executed in the Modulation & Capacity tab which decrease the number of high priority E1 channels (Permanent TDM Traffic) (pag.89).
• Change of configuration of E1 Radio - Extra channels.
All those operations, executed in the Modulation & Capacity tab which decrease the maximum number of low priority E1 channels (Extra TDM Capacity) (pag.92).
All the operations, executed in the tab Extra TDM Priority which change the order used to discard the dynamic E1 channels (Extra TDM Capacity) from the adaptive modulation (Fig.16).
Tab.2 Ports of the cross-connection matrix
*
Equipment ALCplus2 IDU
Ports of the cross-connection matrix
Port Stream Configuration Availability
IduBoard The equipment is not provided with the cross-connection matrix IduBoard
Exp. 16E1 The equipment is not provided with the cross-connection matrix
IduBoard Exp 2xSTM-1 32E1 (1)
Expansion 32xE1 E1 tributaries of
the expansion 32 E1 channels Always available
Expansion STM-1 STM-1 63 VC-12 channels
Port/channels available when the management of STM-1 stream is active (parameter STM-1 MST
x = Value of the parameter Per-manent TDM Traffic.
Port/channels available when the value x is greater than 0
Radio Extra E1
y = Value of the parameter Extra TDM Cap. relevant to the ACM profile with the highest number of E1 (2).
Port/channels available when the value y is greater than 0
(1) The E1 channels of the base board (tributaries A and B) and the A and B channel Radio Extra E1 are not available in matrix for the realization of connections because these channels are already used for the following pre-configured connections:
• Trib. A <-> A Radio Extra E1
• Trib. B <-> B Radio Extra E1
The pre-configured connections cannot be modified nor deleted.
(2) The order used to display the Extra E1 Radio channels depends on the priority defined by the user (Fig.16).
Tab.3 NBUS ports of the cross-connection matrix
*
(1) The first group of 63 E1 channels (1÷63) of the Nodal Bus 1 is protected by the second group of 63 E1 channels (64÷126) of the Nodal Bus 1.
The protection is hard-wired: the first channel of the first group (E1-1) is protected by the first chan-nel of the second group (E1-64); the second chanchan-nel of the first group (E1-2) is protected by the second channel of the second group (E1-65) and so on.
(2) The first group of 63 E1 channels (1÷63) of the Nodal Bus 2 is protected by the second group of 63 E1 channels (64÷126) of the Nodal Bus 2.
The protection is hard-wired: the first channel of the first group (E1-1) is protected by the first chan-nel of the second group (E1-64); the second chanchan-nel of the first group (E1-2) is protected by the second channel of the second group (E1-65) and so on.
IduBoard Exp. Nod.
2xSTM-1 16E1 (1)
Expansion 16xE1 E1 tributaries of
the expansion 16 E1 channels Always available
Expansion STM-1 STM-1 63 VC-12 channels
Port/channels available when the management of STM-1 stream is active (parameter STM-1 MST Mode, values 1+0, 1+1 MSP or 1+1 MSP No ALS)
NBUS... Nodal Bus The available NBUS ports change according to the equipment nodal configuration. The detail is pointed out in Tab.3.
Radio Permanent
x = Value of the parameter Per-manent TDM Traffic.
Port/channels available when the value x is greater than 0
Radio Extra E1
y = Value of the parameter Extra TDM Cap. relevant to the ACM profile with the highest number of E1 (2).
Port/channels available when the value y is greater than 0
Nodal
configuration Protection NBUS ports - Cross-connection matrix
NBUS port Stream Configuration
No Nodal - - -
-ALCplus2
Not protected
NBUS 1 [1..63]
Nodal Bus 1 63 E1 channels (1÷63)
NBUS 1 [64..126] 63 E1 channels (64÷126)
NBUS 2 [1..63]
Nodal Bus 2 63 E1 channels (1÷63)
NBUS 2 [64..126] 63 E1 channels (64÷126)
Protected NBUS 1 [1..63] Protected Nodal Bus 1 63 protected E1 channels (1) NBUS 2 [1..63] Protected Nodal Bus 2 63 protected E1 channels (2) Equipment
ALCplus2 IDU
Ports of the cross-connection matrix
Port Stream Configuration Availability