Avaya Communication Server 1000 Installation And Commissioning Manual page 48

System components
The following rules and recommendations apply to the span usage of the PRI Gateway and
for the D-channels and B-channels as well:
• Each PRI Gateway span can be configured as E1 or T1.
• DCHI supporting DPNSS/DASS protocol can be used with E1 spans only and not with
T1s.
• DCHI daughterboards that support the DPNSS/DASS protocol can be used only on spans
2, 4, 6, and 8. Spans 1, 3, 5 and 7 do not support DCHI daughterboard DPNSS/DASS.
• The onboard DPNSS/DASS protocol can be used on all spans (1, 2, 3, 4, 5, 6, 7 and
8).
• DDCH daughterboard port 1 can be used only on spans 2, 4, 6 and 8.
• DDCH daughterboard port 0 can be used only on spans 1, 3, 5 and 7.
• Each span can be used for B-channels (BCH) solely without any attached DCH
daughterboard.
• With the use of a DCHI daughterboard, the even span can be used only as a DCH
interface. However, the odd span can be used for BCH served by a DCH interface that is
controlled by another DCH span.
• With the use of a DDCH daughterboard, a DCH interface can be defined on any span.
However, if one of the spans is not used for a DCH interface, it can be used for BCHs
served by a DCH interface that is controlled by another DCH span.
• With the use of onboard DPNSS/DASS protocol, a DCH interface can be defined on any
span. However, if one of the spans is not used for a DCH interface, it can be used for
BCHs served by a DCH interface that is controlled by another DDCH span.
See Table 11: DCH interfaces (including DPNSS/DASS) and B-channel usage of the E1/T1
card on page 49. In this table:
• BCH indicates B-channel is used in the span.
• DDCH0 indicates PRI D-channel of port 0 in the DDCH daughterboard is used in the
span.
• DDCH1 indicates PRI D-channel of the port 1 in the DDCH daughterboard is used in the
span
• DCHI indicates that the DPNSS/DASS D-channel is using the DCHI daughterboard.
• DCHI-SW indicates that the DPNSS/DASS D-channel is using onboard
implementation.
48 Media Gateway 1000E PRI Gateway Installation and Commissioning
Comments? infodev@avaya.com
March 2013