Specifications

Chapter 4: Specifications
Connections to the Public Network
Mitel
®
5000 Installation Manual – Issue 3.0, October 2008 Page 4-13
Connections to the Public Network
In the United States, CO trunks are terminated on telephone company 66-type connecting
blocks, as required by FCC regulations. Cross-connect cable connects the 66-type blocks to the
CO terminal blocks on the MDF. The trunks are then connected to the Loop Start Modules
(LSM) using cable terminated with 8-pin plugs wired to RJ-14 specifications. An alternate
method is to interconnect the lines through a patch panel. In Europe, Local Exchange Trunks
are terminated on 237A Krone blocks.
DID trunks are terminated on telephone company RJ-type modular jacks (or on 66-type blocks
that are then cross-connected to modular jack assemblies), as required by FCC regulations.
Two-pair, nonreversing, mod-to-mod line cord is used to connect each DID trunk to the
appropriate jack on the corresponding SLA.
T1 spans and Primary Rate Interface (PRI) spans are terminated on RJ-48C modular jacks or
on 66-type connecting blocks that are then cross-connected to modular jack assemblies, as
required by FCC regulations. Four-pair, nonreversing, mod-to-mod line cord is used to connect
each T1 and/or PRI span directly to the T1 jack on the corresponding T1M or T1M-2 module.
Mitel recommends installing gas discharge tubes with silicon avalanche suppressors on all non-
T1/PRI trunks for lightning protection. For T1, T1/PRI, and E1/PRI spans, the Channel Service
unit (CSU) itself provides the lightning protection. Also, in areas with frequent occurrences of
lightning, it is recommended that the cable between the telephone company termination and the
gas discharge tubes be at least 75 ft (22.5 m) in length. If desired, the cable may be coiled.
Capacities
For general reference purposes, the topics and tables in this section summarize the Mitel 5000
equipment specifications and capacities.
Table 4-9. Trunk Characteristics
Characteristic Specification
Loss from CO to endpoint 0dB (@1 kHz, 0 ft)
Loss from CO to single line set 0dB (@1 kHz, 0 ft)
Loss from CO to CO 0dB (@1 kHz, 0 ft)
Ringer equivalence 0.6B REN
Ringing voltage 40 V
RMS
minimum
Ring frequency 17–63 Hz
Loop current 18 mA, minimum
Protection, tip-to-ring 400 V transient
NOTICE
NOTICE
The capacity values published in this addendum have been validated under controlled
laboratory conditions and supported by real-time field trials in a variety of business
operations. However, the actual capacities that an Mitel 5000 platform can support will
depend on the mixture of trunks and types of endpoints installed, among other network and
environmental factors.
While Mitel converged technology platforms provide advanced communications capability, the
nature of that technology imposes certain physical constraints. These physical constraints
include such things as the number of simultaneous voice channels and signal processing
resources available at any time. The maximum capacities listed indicate tested capability
rather than claims that all the values have been realized at the same time.