Installation manual

IVX 128 Hardware overview/installation
B.17
Special information: DLC12
The
DLC12 card
, one of the five available port cards for IVX 128, is a plug-in design that can be
installed in any of the seven available card slots on the system highway. Each card provides a T1
interface supporting 24 DS0 channels and 12 digital stations.
IVX 128
can have a maximum of two DLC12 cards per system and can provide up to 48 DS0 channels
and 24 digital stations per system. Partial T1 applications are supported through line programming.
Connection to the card is provided through an “industry-standard” 50-pin amphenol connector.
The DLC12 card has
built-in CSU functionality,
eliminating the need for an external unit. The inte-
grated CSU can be enabled or disabled via system programming (see “Function 2124: CSU
emulation,” page EE.6). The following functionality is provided: line, payload, DTE and none (normal
operation) loopback modes with the ability to respond back controlled via system programming;
alarm conditions, and both ANSI T1.403 and TR 54016 performance messages for ESF only.
The DLC12 card supports these
trunk types
:
•
Loop start
•
Ground start
•
E&M
— When an E&M trunk is selected, the choices for
out
going signaling type are immediate
start, wink start and dial tone start; and the
in
coming signaling type choices are immediate start
and wink start. The E&M trunk can be set for 2-way traffic, inbound traffic only or outbound traffic
only.
Dial tone and ringback can be provided when required. These selections are set for
each trunk.
The card supports the following
framing format
and
line coding
:
•
ESF/B8ZS
•
SF(D4)/AMI
•
ESF/AMI
•
SF/B8ZS
Line compensation is provided as necessary between the CSU/DSU and IVX 128.
These selections
apply to all trunks on the DLC12 card. Many variables can affect the volume of the T1 lines. Different
volume levels may be required when connecting a DLC12 card depending on the signal level of the T1.
The volume level can be adjusted by increasing or decreasing the
digital pad setting
. These adjust-
ments are made independently to each of the T1 lines. There will not be any support for pulse
dialing; all incoming dialing will default to DTMF digits.
The
DID and DNIS/ANI translation table
allows the translation of DID/DNIS digits to an IVX 128 ID,
mailbox, extension or department. Up to 300 entries can be programmed in the table. There is also
an entry for exceptions in the table. This allows reroutes of any DID/DNIS calls that are not pro-
grammed or detected to an ID, mailbox, extension or department and defaults to the operator.