Nortel Networks NN43001-106 - Manual (Page 495)

Feature interactions 495
• In LDs 32 and 36, B34 Codec Static Loss Download is suppressed on
enabling the trunk card or unit, so that loss levels do not change in case
there are active calls. Downloading continues to analog line cards.
• When reseating the cards, B34 Codec Static Loss Download is
suppressed. Downloading continues to analog line cards.
• In LD 14, B34 Codec Static Loss Download is suppressed.
• In LD 10, B34 Codec Static Loss Download is suppressed.
When B34 Dynamic Loss Switching is disabled, all B34 Codec Static Loss
Downloads to trunks are suppressed. This introduces the danger of having
some cards in the system which are not set with the proper loss levels,
since the system has been changed from a dynamic mode to a static
mode without activating the download of the static messages. To highlight
this change, a SCH5842 error message is generated, indicating to the
craftsperson that B34 Dynamic Loss Switching is disabled, and that B34
Static Loss Downloading is now in effect and that a download should be
activated by system initialization or SYSLOAD.
When B34 Dynamic Loss Switching is enabled, all B34 Codec Static Loss
Download audit messages to trunk cards are suppressed.
Conference
When a conference connection is established, no pads are switched in on
the trunk side; any extra loss that is required is provided by the conference
circuit based on an algorithm which takes into account the number of lines
and trunks.
Digital Trunk Interface (DTI) Pad Switching
Pad switching for DTI applications is done dynamically, based on the far
end’s port type. On the DTI side, a loss value is switched on the receive and
transmit side, depending on the far end’s port type. If the far end is analog,
a pad is switched in or out; if the far end is digital, a zero loss is switched
in, so that the relative loss is taken care of only on one side. Connection
between DTI/PRI and XDID, XFCOT, and XFEM trunks is not supported,
since DTI pad switching does not take care of these trunk types.
DTI2 Pad Switching
Pad switching for DTI2 applications is done dynamically, based on the far
end’s port type. On the DTI side, a loss value is switched on the receive
and transmit side, depending on the far end’s port type. The far end side is
handled by the normal operation for the trunk type. That is, if the far end
is DTI, it is handled according to the DTI pad switching. If it is otherwise,
it is handled by the configured matrices. No messages are sent for XDID,
XFCOT, and XFEM trunk types. For XUT and XEM trunk types, the loss
Nortel Communication Server 1000
Features and Services - Book 1 of 6 (A to B)
NN43001-106 01.04 Standard
Release 5.0 27 July 2007
Copyright © 2007, Nortel Networks
.