HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual page 226

Configuring E1 and T1 Interfaces
Quick Start
4-40
Table 4-9 shows the default settings for the clock source on each type of
E1 or T1 module.
Table 4-9. Default clock source settings for E1 and T1 modules
Module
One-port E1 or T1 module
Two-port E1 or T1 module
E1 + G.703 module
T1 + DSX-1 module
Eight-port module
10. For T1 interfaces only, configure the line build out (lbo). If the cable
connecting the T1 interface to the wall jack is longer than 655 feet, use
the following lbo command:
Syntax: lbo long <value>
Replace <value> with one of the following numbers, which are in decibels
(db):
• -22.5
• -15
• -7.5
• 0
If the cable connecting the T1 interface to the wall jack is shorter than 655
feet, use the following lbo command:
Syntax: lbo short <value>
Replace <value> with the actual number of feet. For example, if the cable
is 100 feet, enter:
ProCurve(config-t1 1/1)# lbo short 100
11. Activate the interface.
ProCurve(config-e1 1/1)# no shutdown
or
ProCurve(config-t1 1/1)# no shutdown
Port Default Clock Source
1 line
1 line
2 through
1 line
2 through
1–8 line