Specifications

Chapter 5: Installation
Connecting T1/PRI and E1/PRI Trunks to the MDF
Mitel
®
5000 Installation Manual – Issue 3.0, October 2008 Page 5-29
Connecting T1/PRI and E1/PRI Trunks to the MDF
The installation procedure used to connect T1/PRI and/or E1/PRI spans at the MDF depends on
the type of termination used by the service provider [network provider] and how close it is to the
MDF. T1/PRI or E1/PRI trunks may be terminated on RJ-48C modular jacks [RJ45 line jack
units] or on 66-type terminal blocks.
Follow one of the termination methods (A, B, or C) outlined below and illustrated beginning on
page 5-31. The T1/PRI trunk is usually connected to the standard RJ-48C jack provided on the
T1M or T1M-2 module.
Method A – T1/PRI Trunks Terminated on RJ-48C Jacks Near the
MDF
To install T1/PRI trunks terminated on RJ-48C jacks near the MDF:
1. Plug one end of a four-pair, non-reversing [straight through], mod-to-mod line cord into
each service provider RJ-48C jack. The other end of each line cord will later be plugged
into the jack on the corresponding T1M or T1M-2 module.
2. Make sure the connectors on the ends of each line cord are properly attached. If any of
the wires are cracked or broken, transmission problems can occur.
Method B – T1/PRI Trunks Terminated on RJ-48C Jacks Away from
the MDF
To install T1/PRI trunks terminated on RJ-48C jacks away from the MDF:
1. Mount one eight-conductor modular jack [line jack unit] assembly next to each service
provider RJ-48C jack. For a diagram of the complete layout, see Figure 5-10 on page 5-
30.
2. For each modular jack [line jack unit] assembly mounted in step 1, mount a
corresponding four-conductor modular jack [line jack unit] assembly on the MDF
backboard.
3. Connect the modular jack [line jack unit] assemblies mounted in steps 1 and 2.
a. Run T1 cable between the corresponding modular jack [line jack unit] assemblies.
b. Wire each end of the cables onto their respective modular jack [line jack unit]
assemblies. See Figure 5-11 on page 5-30 for a diagram of the wiring.
4. At the service provider termination, plug one end of a four-pair, non-reversing [straight
through], mod-to-mod line cord into each RJ-48C jack and plug the other end into the
corresponding modular jack [line jack unit] assembly next to it.
5. At the MDF backboard, plug one end of a four-pair, non-reversing [straight through],
mod-to-mod line cord into each modular jack [line jack unit] assembly. The other end of
each line cord will later be plugged into the jack on the corresponding T1M or T1M-2
module. Make sure the connectors on the ends of each line cord are properly attached.
If any of the wires are cracked or broken, transmission problems can occur.
NOTE
Primary Rate Interface for ISDN service requires separate licensing.
NOTE
If the service provider termination is more than 2000 ft (600 m) from
the MDF, special T1 cable must be used (see page 4-29 for cable
specifications). For shorter distances, two lengths of standard two-pair
voice-frequency cable (one cable for transmit and one cable for
receive) may be used instead.