Analog And Digital Trunk Types - Nortel BCM50 2.0 Configuration Manual

284 Chapter 28 Market profile attributes
Table 89 ISDN services by Protocol
Protocol
• NI • Caribbean
• ETSI • Australia
Euro
• CALA
• Denmark
• Germany
• Global
• Holland
• Hong Kong

Analog and digital trunk types

The table Analog and digital trunk types and descriptions
analog and digital trunks.
Some of these trunk types are available only when you select specific market profiles.
Table 90 Analog and digital trunk types and descriptions (Sheet 1 of 2)
Trunk types
Digital trunk types
T1/E1
DID
Loop
Ground
E&M
PRI
NN40020-300
Market profile
• North America
• Italy
• Norway
• PRC
• Spain
• Sweden
• Switzerland
• United Kingdom
Digital line that carries data on 24 channels at 1.544 Mbps (North American); 30 channels at 2048 Mbps
(Europe)
Loop, E&M, DID and ground start lines are also versions of T1 lines.
You can program autoanswer 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 used by an outside caller to dial directly into a line on the BCM.
This is a type of T1 line. Use this type of line on systems where the service provider supports disconnect
supervision for the digital loop start trunks.
These trunks provide remote access to the Business Communications Manager from the public
network. This trunk must have disconnect supervision so you can set the trunk to autoanswer, which
provides the remote access portal.
T1-groundstart trunk
These lines offer the same features as loop start trunks, but use these lines 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 recognizes when a call is released at the
far end.
T1 and E&M. Use this type of trunk line 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 1
D-channels at 2.048 Mbps).
These lines give you incoming and outgoing access to an ISDN network and are autoanswer trunks.
Available ISDN services
• Basic Call
• DID
• Name display
• Basic Call
• DDI
• sub addressing (on
S-loop)
• ETSI Call Diversion
(partial rerouting)
on page 284 describes the types of
Description
• Number display
• ONN blocking
• AOC-E (specific changes
for Holland and Italy)
• MCID
• CLIP
• COLP
• CLIR