Mitel MIVOICE OFFICE 250, Installation And Administration Manual, Page: 127 / 585

Specifications
99
Trunking
The MiVoice Office 250 supports various combinations of trunking across T1, T1/PRI, and E1/PRI
spans, IP gateway trunks, and loop start trunks.
Trunking Capacity and Constraints
The MiVoice Office 250 supports up to 104 trunk groups in DB Programming and each trunk group
supports a variable number of CO and IP gateway trunks. Up to 208 trunks can be programmed per
trunk group in DB Programming, but the actual number of trunks that can be connected depends
on the physical constraints of the system. For capacity, see “System Capacities” on page 67. For
programming, refer to the
MiVoice Office 250 Features and Programming Guide
.
For hard-wired, non-IP gateway trunking, system capacity is determined by the number of bays
equipped with T1M, T1M-2, or LSM-2 modules. The system provides three bays (CS Controller) or
four bays (HX Controller) for multi-trunk modules in addition to the loop start trunk circuits built-in to
the back of the Base Server.
For software-licensed IP gateway trunking using SIP gateway trunks, actual capacity is determined
by the number of IP resources and the installation of enabling hardware. A PEC-1 can be installed
to provide additional IP resources. Based on requirements, the customer provides appropriate
equipment to enable IP gateway trunking. For a detailed description of the hardware and procedures
required for installation of SIP or MGCP IP gateway trunks, see “Installing SIP Gateways” on
page 1-337 .
Hard-Wired (Non-IP Gateway) Trunking
In an all-trunk system equipped with required devices and licensing, the MiVoice Office 250 could
support from 2 to 244 hard-wired, non-IP gateway trunks depending on the chassis type. At the low
end of the range, the system could operate on the two loop start trunk circuits that are built-in on
the CS Controller chassis. No trunk modules would be installed in the bays. At the high end of the
range, 244 trunks would be available in an HX Controller system equipped with eight E1/PRI spans
and four loop start trunks.
Capacities of All-Trunk systems
Table 17 summarizes system trunk capacity in terms of the trunk module type and the possible
number of trunks provided in all-trunk systems. A typical installation may include a combination of
hard-wire trunks and IP gateway trunks. See also Table 8, “Maximum Licensing Capacities,” on
page 71 for IP capacities.
Table 17: Trunking Capacity by Type of Module
Module
Type
Trunk/Span
Type
Modules
(CS/HX)
Ports or
Channels per
Module
Trunk
Capacity
(CS/HX)
Built-In LS
Ports
(CS/HX)
Total Trunks
(CS/HX)
T1M
a
E1/PRI 3/4 30 90/120 2/4 92/124
T1M-2 E1/PRI 3/4 30 180/240 2/4 182/244
T1M
a
T1 3/4 24 72/96 2/4 74/100
T1M-2 T1 3/4 24 144/192 2/4 146/196
T1M
a
T1/PRI 3/4 23 69/92 2/4 71/96