Mitel MIVOICE OFFICE 250, Installation And Administration Manual, Page: 183 / 585

Installation
155
Connecting Trunks to LSM-4 Module Ports
This section provides information on connecting CO trunk cables for the LSM-4 module. For this
procedure, see Figure 15 and Figure 16 on
page 155
as a guide.
To connect LSM-4 Module CO trunks:
1. Cable the four-port loop start module port (CO trunks) using the pinouts shown in Figure 15 and
Figure 16 on
page 155
.
• Use a patch panel at the rack and adapters between the patch panel and the Mitel 5000.
Use the fewest modular jacks and adapters as possible, and do not attach any adapters to
the back of the chassis; clearance issues prevent them from attaching securely. If using a
6-pin, 6-conductor patch panel, make the appropriate adjustments when using the adapters.
You can also build your own 6P/6C to 8P/8C patch cables, if necessary.
• If using 4- or 6-conductor modular line cord, limit the length to 6 ft maximum. In general,
modular line cords are not twisted pair and could introduce crosstalk between line 1 and
line 2 at longer lengths.
2. Create the split to create two loop start port connections:
• In Figure 15 on
page 154
, the split to achieve two loop start ports occurs at the patch panel.
This is the recommended option.
Figure 16: Cabling Option 2 for the LSM-2
NOTICE
Equipment Damage : Use adapters when connecting any 6-pin plug to an 8-pin jack. Although
a 6-pin plug will fit into an 8-pin jack, the plastic on the 6-pin plug housing will damage pins 1
and 8 on the 8-pin jack. Not using adapters will increase the likelihood of failure (to pins 1 and
8 in the 8-pin jack) should that jack need to be used with an 8-pin plug in the future. Various
adapter types are available based on how you choose to connect to the patch panel.
1
2
3
4
5
6
not used
not used
T 1
R 1
T 2
R 2
4- or 6-conductor
modular line cord
RJ-14
RJ-14
2 modular jack
assemblies at rack
YEL
GND
BLK
WHT
R2
RED
R1
T2
BLU
T1
GRN
66M1-50
Block
For each modular jack assembly
Chassis Back
Top View
25-Pair cable
from MDF
to rack