Specifications

General Information Guide
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Network
Lines
The system supports the following types of internal voice lines:
• A 10/100BaseT Ethernet connection is required for Mitel Networks IP telephones to connect
through an Ethernet LAN to a 3300 Controller. These lines are supported by the 3300
controller.
• On-Premises (ONS) Lines (24V per port) are for industry-standard DTMF or Rotary Dial
telephones. The external loop resistance on an ONS line must be 600 ohms or less, and the
loop length must be 5000 ft (1500m) or less on 26-gauge wire. These lines are supported by
the 3300 Universal ASU, the 3300 ASU and the ONS line card in the Peripheral unit or
MICRO LIGHT.
Note: Rotary Dial telephones are not supported by the 3300 Universal ASU or the 3300 ASU.
• Off-Premises (OPS) Lines (48V per port) are for industry-standard telephones where the
external loop resistance exceeds 600 ohms or where lightning surge protection is required.
The maximum resistance on an OPS line must be 1800 ohms or less, and the loop length
must be 19,000 feet (5800m) or less on 26-gauge wire. These lines are supported by the
OPS line card and are only available if a Peripheral unit or MICRO LIGHT is installed.
• Digital Network Interface (DNI) Lines provide an interface for Mitel Networks digital
telephones, and consoles. The maximum loop resistance on a DNI line must be 280 ohms or
less, and the loop length must be 3300 feet (1000m) or less on 26-guage wire. These lines
are supported by the DNI Line card and are only available if a Peripheral unit or MICRO
LIGHT is installed.
Trunks
The system can connect to the Public Switched Telephone Network (PSTN) or to private networks
over both digital and analog trunks.
The following digital links are supported:
• DS1 Links - The system supports D4, Q.Sig, MSDN/DPNSS, Primary Rate ISDN (DM-250,
DMS-100, Bellcore National ISDN, 4ESS, NI-2, 5ESS NI2, NI13), and XNET over PRI
protocols. The system connects to DS1 links through the 3300 Universal NSU or the DS1
Formatter card in the DSU cabinet or MICRO LIGHT.
• E1 Links - The system supports DASS II, MSDN/DPNSS, Q.Sig, Primary Rate ISDN (Euro
ISDN (CTR4)), and XNET over PRI protocols. The system connects to E1 links through the
3300 Universal NSU or the CEPT Formatter card in the DSU cabinet or MICRO LIGHT.
• R2 Links - The system supports the CCITT Blue Book, Volume IV, Fascicle VI.4,
Specifications of the Signaling System R2, Recommendations Q.440 to Q.490 (with the
exception of Echo Suppression (Q.479), Test Calls (Q.490) and international signals). The
system connects to R2 links through the 3300 R2 NSU.
• PRI Links - The system supports DM-250, DMS-100, Bellcore National ISDN, 4ESS, NI-2,
5ESS NI2, NI13, and Euro ISDN (CTR4) protocols. The system connects to PRI links
through the 3300 Universal NSU or the PRI card in the DSU cabinet or MICRO LIGHT.