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Page 338 of 532
Line engineering
Table 53
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
553-3001-367
Standard 1.00
Meridian digital telephones use twisted pair wiring on transmission lines
selected by the rules given in "Digital telephones line engineering" on
page
493. 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 53 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 Software Input/Output: Administration
(553-3001-311). All other telephone tones, such as dial tone or overflow, are
provided by the Succession 1000M, Succession 1000, and Meridian 1
systems from a Tone and Digit Switch.
October 2003
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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