Nortel BCM50 Configuration Manual page 133

Figure 36 Properties details panel
Table 28 defines the fields on this panel and indicates the lines.
Table 28 Properties line settings (Sheet 1 of 2)
Attribute Value
Legend: Loop = analog/digital loop; GS = ground start; DID = DID; E&M = E&M; BRI = BRI; DPNSS
= DPNSS; VoIP = VoIP; TL = Target. Note: PRI fields are all included under the main table.
Trunk mode Loop
Unspr
Supervised
*Earth calling
*Loop guarded
*Loop unguarded
l
Dia mode Loop
Pulse
Tone
Loss package Loop (analog
only)
Short CO
Medium CO
Long CO
Short PBX
Long PBX
Impedance (Ohms) Loop (analog
only)
600 ohm-900 ohm The GATM can be set to a specific impedance level.
Description
Define whether disconnect supervision, also referred to as loop
supervision, releases an external line when an open switch
interval (OSI) is detected during a call on that line. You must set
this to Supervised if a loop trunk has its Answer mode set to
Auto or if you enable Answer with DISA. Disconnect
supervision is also required to conference two external callers.
The line must be equipped with disconnect supervision from the
central office for the Supervised option to work.
* These listing only appear for UK analog lines.
GS DID E&M
Specify whether the system uses dual tone multifrequency
(DTMF) or pulse signaling on the trunk.
Tone does not appear if Signaling is set to Immediate
(T1 DID &T1 E&M trunk types only).
Select the appropriate loss/gain and impedance settings for
each line, see
Chapter 10 Configuring lines
Table 12.
Networking Configuration Guide
133