Alcatel-Lucent 9500 MXC - Planning a Ring Network

Vol. VI-A-4 Alcatel-Lucent
Planning a Ring Network
Circuit allocation is a key requirement in implementing a ring network. Within a
protected PDH ring, each E1 or DS1 circuit can be used only once. It is therefore
vital to have at the outset a clear picture of where each circuit enters and leaves
the ring. In particular, the information must provide:
• Number of nodes on the ring, and node type (INU or INUe).
• Ring capacity.
• Ring type (north-south, or any-to-any).
• Location of the required plug-ins within each INU/INUe.
• An overview of the number of circuits entering and leaving the ring at each
node.
• A list for each node detailing:
• The ring circuit numbers to be drop-inserted, and
• The ring circuit numbers to be passed-through.
Figure A-1 shows an example of a ring topology planning sheet for a
North-South ring.
Figure A-2 shows an excerpt from the circuit allocation planning sheet for the
example provided in Figure A-1.