Loop Start Trunks - Mitel 3300 ICP Hardware Technical Reference Manual

C 3
HAPTER
ONS Station Line Circuits by ASU type (Continued) (Sheet 3 of 3)
Table 3.6:
Ringing voltage (open cct)
Timed Flash detection
:
NOTE
Approximately 0.68 mile (1.1 km) of loop range over 26-gauge cable with 300 ohm set.
1.
Approximately 5.17 miles (8.28 km) over 22-gauge cable with 300 ohm set, or 3.25 miles (5.19 km)
2.
over 24-gauge cable with 300 ohm set, or 2 miles (3.2 km) over 26-gauge cable with 300 ohm set. -
Minimum 40 Vrms
Cable length = (1200 - set offhook DC resistance) / cable resistance per length
Cable resistance:
22 gauge - 109 W / km (174 W / mile)
–
24 gauge - 172 W / km (277 W / mile)
–
26 gauge - 274 W / km (441 W / mile)
–
Used for sending CLID.
3.
CLASS message only.
4.
The MWI signal provided by the ASU II and the AX is intended to be used with phones that support
5.
Up to 1600 ohms (including DC resistance of set)
6.
Strike voltage < 100 V. The MWI signal provided by ASU is intended to be used with phones that
7.
support 90V signaling.
10 Kohm per set
8.
Protected ONS Ports
Protected ONS ports (ONSP) are available on:
the ONS/LS combo card (can be used on the ASU II and the AX)
•
the 16 and 24 port ONS cards (can be used on the ASU II and the AX)
•
ports 1 and 2 on the CXi to CXi II Controllers with AMB Version III
•
ports 1 and 2 on the CXi/CXi II and MXe Controller (PN 50005090) with AMB Version III
•
The ONSP ports are suitable for off-premise applications and meet the requirements of 60950-01 and IEC
55024. Regular ONS ports are intended for on-premise applications only.ONSP ports use the same loss
plan settings as regular ONS ports.

Loop Start Trunks

Loop Start Trunks by ASU Type (Sheet 1 of 2)
Table 3.7:
Attribute
50 Hz Meter Pulse
Detection
55 Vrms
min. 100 ms
ASU II
No
C
S
ERVICES
65 Vrms
min. 100 ms
ASU
UK only
D
IRCUIT ESCRIPTIONS
U G
NITS AND ATEWAYS
50