Raisecom RC3000 PCM User Manual page 67

panel, all RC3000 devices can be managed. To realize whole network management the
following rules must be obeyed:
If time slot 0 is network management channel, the maximum rate of serial data is
2400bps, otherwise there will be error codes.
If time slot 1 is network management channel, the serial data rate can be up to 9600bps
and time slot 1 cannot be cross connected, otherwise RC3000 will work abnormally.
Time slot is recommended.
Network management topology rule is the number of network management channels
decides the number of E1 direction as follows:
RC3000-2E1
Three RC3000 devices make up this network and a PC can manage them all when
connected to LINK UP interface of the first RC3000.
Device 1: Set the second bit of DIP-switches ON, and others OFF; use one E1, time slot
0 and single E1 direction.
Device 2: Set all DIP-switches OFF; use two E1s, time slot 0 and double E1 direction.
Device 3: Set all DIP-switches OFF; use one E1, time slot 0 and single E1 direction.
If connect two RC3000 devices through two E1, the number of used E1 will not be same
as that of network management topology E1 directions. See in following figure:
In this topology device 1 and 2 are connected through 2 E1 (4 E1 if it is optical interface),
but the network management topology must be configured as follows:
Device 1: Set the second bit of DIP-switches ON, and others OFF; use two E1, time slot
0 and single E1 direction.
Device 2: Set the second bit of DIP-switches ON, and others OFF; use two E1, time slot
0 and single E1 direction.
If either of these two devices' network management topology is configured as double E1
direction, the remote device cannot be managed.
When use three RC3000 devices to make up a ring, the number of used E1 will not be
same as that of network management topology E1 directions. See in following figure:
Device 1
Figure 41
RC3000-2E1
Device 1
Figure 42
1E1
RC3000-2E1(ADM)
Device 2
1E1 1E1
2E1 2E1
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2E1
RC3000-2E1
Device 3
RC3000-2E1
Device 2