Line Engineering; Local Alerting Tones - Meridian Nortel 1 Option 11C Technical Reference Manual

Nortel networks network system technical reference guide
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Line engineering

Table 100
Loop lengths for Meridian digital telephones
PVC insulated cable
(polyvinyl chloride)
22 or 24 AWG
26 AWG
Note 1: No bridge taps or loading coils are allowed.
Note 2: Effect of line protector at MDF reduces loop length by 500 ft.

Local alerting tones

553-3011-100
Standard 14.00
European Digital telephones: 3110, 3310, and 3820
EN 50081-1:1992 - Electromagnetic Compatibility - Generic emissions
standard. Generic standard class: Residential, commercial and light industry.
Meridian digital telephones use twisted pair wiring on transmission lines
selected by the rules. The maximum permissible loop length is 3500 ft.
(1067 m), assuming 24 AWG (0.5 mm) standard twisted wire with no bridge
taps. A 15.5 dB loss at 256 kHz defines the loop length limit. (Longer lengths
are possible, depending on the wire's gauge and insulation.) Table 100 gives
detailed information on loop lengths.
QPC578 A and B
100–3000 ft.
(30.5–915 m)
100–2100 ft.
(30.5–640 m)
Note: Use only the line cord provided with the telephone. Using a cord
designed for another telephone could result in damage to the cord.
Each telephone provides four alerting tones and a buzz sound. The system
controls the ringing cadence by sending tone-ON and tone-OFF messages to
the telephone. The alerting tone cadences cannot be changed from the
telephone but can be altered for individual terminals by software controlled
adjustments in the system. See Administration (553-3001-311). All other
telephone tones, such as dial tone or overflow, are provided by the Meridian 1
from a Tone and Digit Switch.
January 2002
QPC578 C +
0–3500 ft.
(0–1067 m)
0–2600 ft.
(0–945 m)
NT8D02
0–3500 ft.
(0–1067 m)
0–2600 ft.
(0–793 m)

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