Nortel BCM50 Configuration Manual page 91

Target lines
Target lines are internal communications paths that directly connect auto-answer trunks to system
telephones. These lines are incoming only.
Target lines allow you to make more efficient use of DID line resources.You can map a range of
target lines for each DID line. The incoming call is routed according to the mapped dialed digits,
rather than a one-to-one line assignment. Systems configured using the DID template
automatically assign target lines to all assigned DNs.
You also require target lines when you use PRI, T1 or VoIP trunks.
Target lines use line numbers 125 to 268. To view these lines, select Configuration > Telephony
> Lines > Target Lines. Record this information in your system Programming Records so you
have a clear view of where each line is assigned.
Other features:
• Each target line can be assigned to more than one telephone.
• A telephone can have multiple appearances of a target line.
Target lines are internal direct links the BCM uses to allow external callers to dial specific system
telephones or a group of system telephones. You assign the target line to one or more telephone
DNs, and then configure the target line to function as you require. You can also assign multiple
appearances of a target line to one telephone. This allows more than one call to simultaneously use
the target line. Target lines are required by lines that support multiple numbers over one trunk (T1
E&M, DID trunks, T1 DID trunks, PRI trunks, and VoIP trunks).
Caution: Changing the received # length:
If you change the received # length for your system, the Public number entry for the
target lines will clear if the new received # length is less than the number entered in this
field.
If the new received # length has more digits than the number entered in this field, you need
to change the entry manually, if changes are required.
Programming note: The following trunks use one or both of these settings to route calls:
• DPNSS lines use the Private received number to route calls in the system.
• BRI ETSI-QSIG, PRI ETSI-QSIG, MCDN, DMS-100, DMS-250, and VoIP trunks route calls
on a per-call basis to either the public or private received digits.
Note: VoIP trunking MCDN calls do not support Auto DN/DISA DN
functionality.
• BRI (ETSI-Euro, NI), PRI (ETSI-Euro, NI, 4ESS), T1 (LoopStart, E&M, DID, GroundStart),
Analog LEC (LoopStart), and DASS2 trunks route calls using the Public received number.
Chapter 8 Lines overview
Networking Configuration Guide
91