S0 BUS
After validating the parameters of a BRA or BPRA..., you must install the S0 buses.
THE POSSIBLE MODIFICATIONS ARE NOT TAKEN INTO ACCOUNT IMMEDIATELY. THEY ARE TAKEN INTO ACCOUNT AT THE ATTRIBUTE LEVEL OF THE BRA, BPRA BOARDS AFTER:
- MODIFYING ANY ATTRIBUTE OF BOARD MANAGEMENT,
- OR, RESETTING THE BOARD
Equipment Address
The physical address of subscriber station corresponds to the slot of the bus in the S0 interface:
- between 0 and 7 for BRA boards,
- between 1 and 3 for BPRA boards.
The stations of this bus may be installed at the same physical address (see address equipment attribute in USERS SETS).
Protocol Type
This attribute is used to choose the protocol according to the creation of S0 terminals installed on the bus.
The choice is given by using this menu:
- VN2 (Only France)
- VN3 (Only France)
- ETSI (All countries)
Long Passive Bus
YES:
- if several stations (5 max.) are spread out along a bus which is not longer than 150m.
- if several stations (5 max.) are installed at the end of a bus which is not longer than 500m.
- if only one station is installed at the end of a bus which is not longer than 1500m.
Permanent Layer 1
YES: Permanent Layer 1
Permanent layer 1 management (declared in the S0 Bus management) on a TA CTI-S0 (4094) is considerably different to that of an S0 on a BRA2 or BPRA2 board:
- On BRA2 and BPRA2 boards, layer 1 is permanent once it has been activated by a request from an S0 terminal initializing an outgoing call or by the system during an incoming call to the S0 terminal.
- In both cases, layer 1 will remain active until the physical disconnection of the S0 terminal. Even if layer 2 is disconnected, layer 1 remains active.
- On TA CTI-S0 (4094), layer 1 is activated as previously, but it only remains permanently active in the case of an incoming call to the S0 terminal.
- In the case of an outgoing call from an S0 terminal, layer 1 will not remain active following a layer 2 disconnection.
- The solution to retain a permanent layer 1 is either to retain layer 2, or to generate a call to the S0 Bus (it is not necessary to set up the call).
S0_FV
In some countries, e.g. Germany), you can lease a private line via the public network. This type of line is called SO FV.
NO: the SO bus is connected locally. The physical cable used to connect the SO equipment to the 4400 is entirely private. This type of line is called SO FV.
YES: the SO bus is connected via a leased line.
S0 Timers
Management of this time-outs is only applied to S0 accesses. For management of the same time-outs applied to T0 and T2 accesses, refer to "TRUNK COS": group ISDN and group T2 T0 IPNS ISDN).
The unit for timers are 100ms.
The following time-outs (except for time-out 302) are used to receive and transmit ISDN messages.
- Time-out 302: time-out between information messages.
- Time-out 303: maximum answer time-out of S0 stations
- Time-out 305: time-out after which a disconnection message is sent
- Time-out 307: maximum time-out during which the call is in standby (portability) before being retrieved.
- Time-out 308: time-out of channel B release
- Time-out 309: maximum waiting time-out of level 2 re-connection
- Time-out 310: time-out for waiting the answer alert, connection, release.
- Time-out 312: maximum waiting time-out in the case several stations ring.
Tel.Facility Category ID
Each telephone service COS contains the authorizations for access to some features and the type of routing when going off-hook (see PHONE FEATURES COS).
Default No.
This directory number is that of one of the S0 stations assigned to the bus, called, on this occasion, main station.
This number contains from 1 to 8 digits or characters corresponding to the dialing keypad of the stations (0 to 9, *, #). Characters A to D may possibly be used.
S0 Users List
This list only appears in edition; it cannot be modified.
It contains the directory numbers of the S0 stations installed at this address (see equipment address attribute in USERS SETS).