The Data Bridge Card for Loop-O9500R, Loop-O9550, and Loop-AM3440 series has 8 RS232 ports. On the Data Bridge Card, each RS232 port uses data bridge function on 1DS0 sync 56 kbps or 64 kbps channel to get the ASYNC data from the host data server (ASYNC data rate ranges from 1.2K bps - 19.2K bps). Then the host data server will broadcast the data to the remote tributary site.
Under operation, 1 to 20 end points per multi-drop circuit go into a logical ended 56K or 64K channel, and the data at the tributary and the host end enters the channel banks through RS232 synchronous interfaces. The primary is then either mapped out the RS232 synchronous port, or is mapped to another upstream DS0. Each port RS232 could support the data bridge function reaching to 20 remote tributary sites. Each tributary is asynchronous data sent over synchronous channel using over-sampling techniques.
Protection can be (a) 1+1 on a pair of ports on the same card which provides line protection, (b) 1+1 on pair of ports on adjacent cards which provides card protection, or (c) 1+1 on a pair of ports on different chassis which provides chassis and site protection.
Note: Although the Data Bridge Cards serve the same hardware function on O9500R, O9550, and AM3440, they have different firmware.
- Hot pluggable single slot card for O9500R, O9550, and AM3440 series
- ASYNC RS232 data only
- Two card types, both support 8 ports RS232 ASYNC
- 8 RJ48C card
- 2 RJ48C + 2 DB44 card
- Data bridge features
- Each card supports up to 128 DS0
- Each port supports bridge functionality to N remote tributary sites (N = 1-20)
- Works with the other equipment in the transmission of 1200 to 19200 bps asynchronous data via oversampling channel
- 1+1 port protection
- 1+1 slot protection, switching time < 50 ms
- Dual Host Data Server
- LED status indicator
1 + 1 backup function on one Data Bridge Card
RS232 port1 and 5, port 2 and 6, port 3 and 7, port 4 and 8 work in pairs to support 1+1 backup function. Port1 to port 4 connects to the active host data server, and port 5 to port 8 connects to the backup host data server.
1 + 1 backup function on single chassis
The Data Bridge Card in slot 1 and 2, slot 3 and 4, slot 5 and 6…slot 11 and 12 work in pairs to support 1+1 backup function.