4.14 Application > ATM
This requires installation of the SDH and/or PDH and ATM option.
CMA 3000 with the SDH interface option can support ATM functionality when the ATM option is installed. The ATM application may be configured as either 1 transmitter - 1 receiver, or as 2 receivers (the mode field in the setup screen dumps shown below). All ATM setup is reached by select-ing ATM in the Application menu.
4.14.1 Transmitter
The ATM transmitter generates ATM cells according to the following prin-ciples:
• Foreground VP/VC defines a VPI/VCI pair to carry a PRBS payload (and optionally contain certain alarms).
• Background VP/VC defines VPI/VCI pairs carrying a constant pay-load.
• Empty cells are generated when necessary to accomplish the de-fined rates.
Fig. 4.105 The ATM Transmitter screen.
Interface Press the Interface field and select the requested Interface from the drop-down menu. Choose E3 also in the case where the E3 frame is embed-ded in SDH.
Scrambling Tick the Scrambling checkbox when ATM payload scrambling is required.
Type Select either UNI or NNI interface.
Foreground VP/VC Tick the checkbox to enable transmission of foreground cells. GFC, VPI, VCI, PTI, CLP, Payload and Rate are selectable by pressing the corre-sponding field. Insert values using the launched keypad menu.
When QoS is selected in the ‘Payload’ drop-down menu, the transmitter sends ‘QoS cells’ which the receiver uses when analyzing the QS param-eters in the network.
Empty Cells Type Press the Empty Cells Type field and select the requested type from the drop-down menu. The rate is calculated automatically.
Background VP/
VC
Click the [Add] softkey to define a new background VPI/VCI pair to be generated.
Click the [Edit] softkey to alter a background VPI/VCI pair to be generat-ed.
Click the [Delete] softkey to remove a background VPI/VCI pair to be generated.
Click the [Delete All] softkey to remove all background VPI/VCI pair to be generated.
Traffic Profile From the Traffic Profile sub- tab it is possible to select different forms of Distribution. For each distribution type, corresponding setups will appear for definition of e.g. pulse lengths, rates etc. Below some examples on traffic profiles and their setups are shown.
Fig. 4.106 Examples of traffic profiles.
4.14 Application > ATM
4.14.2 Receiver A/B
Receiver(s) detects and counts ATM cells for a number of VPI/VCI pairs:
• The foreground VP/VC defines the VPI/VCI pair to be monitored for certain alarms (e.g. VP AIS), cell statistics and optionally a payload PRBS.
• The background channels (up to 29) define VPI/VCI pairs to be mon-itored individually regarding cell statistics.
Fig. 4.107 The ATM Receiver setup screen.
Interface Press the Interface field and select the requested Interface from the drop-down menu. Choose E3 also in the case where the E3 frame is embed-ded in SDH.
IMA Tick the IMA checkbox when monitoring IMA traffic (2 Mbps only).
Scrambling Tick the scrambling checkbox when ATM payload scrambling is required.
Type Select either UNI or NNI interface.
Foreground VP/VC Defines the foreground to be monitored. GFC, VPI, VCI and Payload are selectable by pressing the corresponding field. Insert values using the launched keypad menu.
Background VP/
VC
Click the [Add] softkey to define a new background VPI/VCI pair to mon-itored individually.
Click the [Edit] softkey to alter a background VPI/VCI pair to be moni-tored individually.
Click the [Delete] softkey to remove a background VPI/VCI pair to be monitored individually.
Click the [Delete All] softkey to remove all background VPI/VCI pair to be monitored individually.
Click the [Clone] softkey to clone (make a copy of) the selected back-ground VPI/VCI channel.
O.191 Selecting the O.191 sub-tab will launch its setup screen as shown below.
Fig. 4.108 O.191 setup screen launched.
From the O.191 Type field, select either In-Service or Out-of-Service.
From the Cell Loss Timeout field the timeout can be set.
From the Cell Delay Upper Limit field the upper limit of the cell delay can be set.
From the Cell Delay Lower Limit field the lower limit of the cell delay can be set.
From the O.191 Block Size drop-down menu the block size can be set.
4.14.3 VP/VC Filter
Selecting the VP/VC Filter tab opens a filter setup for the receivers.
Fig. 4.109 The VP/VC Filter setup screen launched.
VP/VC Filter When enabling the VP and/or VC filter (done by setting a check in the box) it is possible to define the filter settings via the ‘From’ and ‘To’ setup
4.14 Application > ATM
4.14.4 Scan
ATM Scan can be started from the Scan tab by clicking the softkey locat-ed at the status bar.
Fig. 4.110 The Scan screen.
As the scan functionality follows the current receiver setup - the Interface to be scanned must be selected on the ATM receiver setup pages.
The scan will detect up to 150 VP/VC pairs, if more are present on the link this bandwidth is shown in the list as “Other VCC’s”.
Default the Rate is shown as CPS, kbps and % the user is able to enable/
disable kbps and %.
It is possible to sort the list of columns by clicking the column headers.
A found VP/VC pair can be selected and applied directly as the corre-sponding receivers foreground channel.
When another scan is started the old results are cleared.