Bri And Pri Line Types; Table 67 Bri And Pri Line Types (Dtm And Bri Modules) - Nortel BCM50 Configuration Manual

Defining region-based defaults

BRI and PRI line types

Table 67 provides a description of the types of lines that BRI and PRI trunks can provide. These
are set under Resources, Media Bay Modules, Bus XX, Module X on the Element Manager.
Note that some of these line types are only available when specific regions are chosen.
Table 13 BRI and PRI line types (DTM and BRI modules)
Digital trunk types
T1
DID
Loop
Ground
E&M
PRI
Description
digital line that carries data on 24 channels at 1.544 Mbps (North American);
30 channels at 2,048 Mbps (Europe)
Loop, E&M, DID and ground start trunks are also versions of T1 lines.
You can program auto-answer T1 loop start, T1 E&M trunks, T1 DID, T1 ground
start trunks, PRI and IP trunks to map to target lines to provide for attendant
bypass (calling directly to a department or individual) and line concentration (one
trunk can map onto several target lines).
This is a type of T1 trunk line that allows an outside caller to dial directly into a line
on the BCM50.
This is a type of T1 line. This type of line is used on systems where the service
provider supports disconnect supervision for the digital loop start trunks.
These trunks provide remote access to the BCM50 from the public network. This
trunk must have disconnect supervision to allow the trunk to be set to
auto-answer, which provides the remote access portal.
T1-groundstart trunk
These lines offer the same features as loop start trunks, but are used when the
local service provider does not support disconnect supervision for digital loop start
trunks. Ground start trunks work with T1 only. By configuring lines as ground start,
the system will be able to recognize when a call is released at the far end.
T1 and E&M. This type of trunk line is used to create simple network connections
to other phone systems.
This trunk always operates in a disconnected supervised mode.
ISDN interface with 23 B channels and 1 D channel at 1.544 MBps (in Europe:
30 B channels and 2 D channels at 2.048 Mbps).
This is the module that controls system timing.
These lines give you incoming and outgoing access to an ISDN network and are
auto-answer trunks, by default.
These lines provide a fast, accurate and reliable means of sending and receiving
data, images, text and voice information. using PRI lines allows for faster
transmission speeds and the addition of a variety of powerful business
applications, including remote LAN access, video conferencing, file transfer and
internet access.
Section 3: Features
BCM50 Device Configuration Guide
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