Nortel Networks NN43001-106 - Manual (Page 503)

Feature interactions 503
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 telephone transmission parameters
The following static parameters, which do not change on a connection basis,
can be changed using LD 17:
• sidetone objective loudness rating
• receive objective loudness rating
• transmit objective loudness rating
• handsfree receive objective loudness rating
• handsfree transmit objective loudness rating
• handsfree receive objective loudness rating
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 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.
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 equivalent to pad out is switched in. For XDID, XFCOT, and
XFEM trunks, the base level (static) value is switched in when connected to
the DTI2 trunk types.
Echo Suppression
When the echo suppresser is turned on for XEM and XFEM trunks, the pad
is switched to out. For XEM and XFEM trunks with B34 port types, the base
loss level for the affected port type is switched in to match the operation of
switching out the pad.
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
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