Dynamic Pad Switching Overview - Nortel Meridian 1 Succession 1000 Manual

Page 50 of 236 Dynamic Pad Switching

Dynamic Pad Switching overview

553-3001-182 Standard 1.00
DPS determines the pad state on a per-connection basis for the following:
• North American and North American-based Intelligent Peripheral
Equipment (IPE) trunks, with the exception of Chinese IPE where
Dynamic Loss Switching is used for both ONS and OPS classes of
service.
XTRK = XUT or XEM in LD 14
• International Generic XFCOT (NT5K16) Central Office Trunks (COT)
The use of the term "per-connection" highlights that within a single call, there
can be a number of different connections required. An example is an
incoming trunk call. The trunk connects to the Tone and Digit Switch (TDS)
to receive ring back tone; when the called party goes off hook, the trunk
disconnects from the TDS and connects to the called party. This call can use
two pad settings for the two different connections.
A predefined matrix that takes into account the port types involved in a
connection is what determines the pad state. The following criteria identify
the port types involved in a connection:
• unit type
• Class of Service (CLS)
• Trunk Signaling
• XTRK type
The trunk data block Class of Service (CLS) assignment characterizes the
transmission properties of each trunk.
The DPS-related options for XUT and XEM trunks are
• VNL (Via Net Loss)
• Non-VNL, either:
TRC (Transmission Compensated)
or NTC (Non-Transmission Compensated)
October 2003