Expert Documentation

Chapter 7
- Network type: Private; modifiable.
Note:
When access is configured in network, synchronization parameters are no longer modifiable. Access is
synchronized by its system and transmits the clock to the remote system.
7.5.1.2 Configuration
All configurations are carried out by OMC (Expert View): External lines -> External Access
Table -> Digital Access: Details
7.5.1.2.1 Conversion of a T0 access into a DLT0 access
When booted up, all accesses by BRA boards are configured as T0 accesses. Conversion of a
T0 access into a DLT0 access is carried out by OMC (see screen below) in modifying the
following parameters for each access:
- Protocol = QSIG
- Layer 1 / Layer 2 Mode = User (default value if the QSIG protocol is used) or Network.
This change results in the following parameters:
- Synchronizing clock: Yes if User, or No (in grey) if Network.
• If User: Yes
• If Network: No (in grey)
- Synchronization priority:
• If User: 210
• If Network: No (in grey)
- B-channels specialization:
• If User: Allocation = Descending; Collision = Slave
• If Network: Allocation = Ascending; Collision = Master
- Number of B-channels: 1
- Public Network: No (in grey)
- TEI Management: Point-to-point (in grey)
- Automatic TEI negotiation: Non (in grey)
- Fixed TEI: 0 (in grey)
In User, validation (OK key) only relates to the selected access while in Network, validation
also relates to the associated access.
7.5.1.2.2 Conversion of a DLT0 access into a T0 access
The return of a DLT0 access to a T0 access is carried out by OMC (same screen as before) in
modifying the following parameters:
- Protocol = EDSS1
- Layer 1 / Layer 2 Mode = User (in grey).
This change results in the following parameters:
- Synchronizing clock: Yes.
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