Mitel 3300 Technician's Handbook page 259

Figure 105: T1/E1 Combo Card - Resilient, from Release 7.0
Table 23: T1/E1 Combo Card Tip/Ring Assignments
Pin Signal
1 --
2 --
3 N/C
4 --
5 --
6 N/C
7 N/C
8 N/C
Note: Network and Line Termination settings are software-controlled. DO NOT
move the jumpers. The settings apply to both connectors on the resilient card.
NT/LT Settings
NT (Default)
Rx Ring
Rx Tip
--
Tx Ring
Tx Tip
--
--
--
Hardware Reference
LT
Tx Ring
Tx Tip
--
Rx Ring
Rx Tip
--
--
--
249