Installation manual

PS10270JENAA01 20/10/2004 75
Wiring the LIX cards
Tie lines (TLs) are private or leased lines used to inter-link two PBXs. There are two types of tie
line:
• analogue (2-wire/4-wire), using the LI1 card
• digital (PCM or T0 QSIG, T2 QSIG)
The LI1 card with the reference HJ3950B can be used to connect two analogue tie lines. These
analogue TLs are wired using either two or four wires:
• with a two-wire TL, voice communications are carried in both directions on the same pair (LA
and LB)
• with a four-wire TL, one pair is dedicated to reception and the other pair to transmission
Note: A connector lead with the reference HG4066A simplifies wiring analogue TLs on the LI1
card.
C1
C2
1
10
1
10
Length 5 m (10 pairs)