Nortel BCM50 Configuration Manual page 107

Table 14 Module parameters values (Sheet 4 of 4)
Attribute Value
T1 parameters
CO fail
Specify a carrier failure standard (T1A-5474, TR62411)
Interface levels ISDN, PSTN
Define a loss plan setting. For more information, see
Framing ESF, SF
Select the framing format used by your T1 or PRI service provider: Extended Superframe (ESF) or
Superframe (SF). Contact your T1 or PRI service provider for the proper setting. (SF or Superframe is
sometimes known as D4.)
Line coding B8ZS, AMI
Define the encoding signals on a T1 line. Select the standard used by your T1 service provider.
Contact your T1 service provider for the proper setting.
Internal CSU <check box>
Turn the internal T1 channel service unit (CSU) on or off. For more information, see
page 108.
CSU line build 0, 7.5, or 15 dB
Set the gain level of the transmitted signal. This setting appears only when the Internal CSU is
Enabled.
DSX1 build 000-100, 100-200,
200-300, 300-400,
400-500, 500-600, or
600-700 feet
Set the distance between BCM and an external channel service unit. This setting appears only when
the Internal CSU is Disabled. Contact your service provider for the proper settings.
CRC4 <check box>
Ensure this is enabled or disabled to match the service provider Cyclic Redundancy Check (CRC4)
setting for the trunk.
Station modules do not have any configurable module parameters.
Interface levels
The default Interface levels are the ISDN loss plan settings. Also refer to
page 535.
Check with your telecommunications service provider to determine if your BCM system is
connected to a central office (CO) with digital network loss treatment (ISDN I/F levels) or analog
network loss treatment (PSTN I/F levels).
Chapter 9 Configuring telephony resources
Module/line type
T1 PRI
T1 PRI
T1 PRI
T1 PRI
T1 PRI
T1 PRI
T1 PRI
E1
PRI
"Interface levels" on page
"ISDN overview" on
Networking Configuration Guide
107
107.
"Internal CSU" on