User`s manual

Chapter 1 Overview
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1.6.5.2 Bandwidth occupied by E1 Traffic
When some of the bandwidth is assigned to E1 traffic, it reduces the number of
VC-12s available for carrying Ethernet traffic.
The reduction in bandwidth available for LAN traffic is as follows:
 MUXpro 820: the number of VC-12s will be reduced by 8, form 63 to 55 if full
E1 is assigned.
 MUXpro 8216: the number of VC-12s will be reduced by 16, form 63 to 47 if
full E1 is assigned.
1.6.6 Mappers for E1 Subsystem
The functions provided by the mappers serving the various E1 interface options
are described below. The multiplexing structure is as Appendix G.
1.6.6.1 Functions of E1 Mapper for SDH Network Interface
The E1 mapper enables mapping the data stream of each E1 port to any of the 63
VC-12 in the STM-1 signal.
To enable rapid service start-up, default mappings are used:
 When no groups are used, the signal from each E1 port is inserted in the
VC-12 with the same number, that is, E1 port No. 1 is inserted in VC-12 No. 1,
E1 port No. 2 is inserted in VC-12 No. 2, etc.
 When groups are used, the groups are mapped first, followed by the E1 ports,
in the following order:
 All the defined groups (starting with the group 1 and up the maximum
defined) are assigned the first VC-12s
 The signal from the E1 port is inserted in the first free VC-12 after the last
VC-12 assigned to a group, and so on.
In most applications, these defaults need not be changed:
 When the MUXpro operates as a terminal multiplexer, which connects to the
transport backbone through an ADM, the ADM can always be configured to
perform any cross-connection that may be required.