Principles of Configuring the BSC Transmission Links (A over IP)

This describes the principles of configuring the BSC communication links and signaling links in A over IP mode.

The subrack communication link is established between the GMPS and the GEPS.
A maximum of three communication links can be configured between two subracks.
The communication between subracks is achieved through the GTNU in each subrack. There are six external ports, numbered TDM0-TDM5, on the panel of the GTNU. Each port can be used by only one communication link between subracks.

The OPC of each entity muse be unique.
The BSC can be configured with up to 1 local entity, 32 signaling transfer entities, and 32 destination entities.
The names of the local entity, destination entity, and transfer entity should not contain the character #.
The name of each local entity, signaling transfer entity, or destination entity must be unique. The name of the destination entity can be the same as the name of the local entity but must be different from the name of the signaling transfer entity; the same of the signaling transfer entity can be the same as the name of the local entity but must be different from the names of configured destination entities.
The route context of the local entity can be the same as the name of the destination entity; the route context of the destination entity can be the same as the name of the local entity but must be different from the names of other configured destination entities; the route context of each signaling transfer entity must be unique, and must be different from the route context of the destination entity. When the value of the route contexts is invalid (4294967295), the route contexts can be the same.

The M3UA links are configured on the GFGUA and GOGUA.
Each link set is configured with up to 16 M3UA links.
The Local Address 1, Local Address 2, IP address, Peer Address 1, and Peer Address 2 of the M3UA link should not be the same.

The semipermanent link is established between the GMPS and the GEPS.
For a semipermanent link, at least one of the following pairs of numbers must be different: the in-BSC subrack number and the out-BSC subrack number, the in-BSC slot number and the out-BSC slot number, and the in-BSC port number and the out-BSC port number.
If the data rate of a semipermanent link is 16 kbit/s, In-BSC Timeslot No. and Out-BSC Timeslot No. should be set to 0, 2, 4, or 6. If the data rate of a semipermanent link is 32 kbit/s, In-BSC Timeslot No. and Out-BSC Timeslot No. should be set to 0 or 4. If the data rate of a semipermanent link is 64 kbit/s, In-BSC Timeslot No. and Out-BSC Timeslot No. should be set to 0. If the data rate of a semipermanent link is 8 kbit/s, In-BSC Timeslot No. and Out-BSC Timeslot No. can be set to any value.
The timeslots on semipermanent links can be multiplexed onto the 64 kbit/s timeslot on one BSC port. The timeslots on semipermanent links and the monitoring timeslots can be multiplexed onto one 64 kbit/s timeslot on one BSC port.
The specified BSC port timeslot for a semipermanent link must be NULL, CIC, or FlexTS.
A maximum of 200 semipermanent links can be configured.

You need to configure the Pb interface E1/T1 when BSC is configured with the external PCU.

You need to configure the Pb signaling link when the BSC is configured with the external PCU.

Each GMPS or GEPS can be configured with up to sixty-four 64 kbit/s Pb signaling links.

For details on the principles of configuring the Gb interface links, see Principles of Configuring the Gb Interface Links.