Avaya MCC1, Установка и обновления

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Install and Wire Telephones
Off-Premises Connections
528 SI Installation and Upgrades
June 2004
Figure 204: Connections to 24 Out-of-Building Telephones
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Off-Premises Protection Requirements
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Both building entrances require carbon block or equivalent protection and sneak current protection.
Protection can be provided by:
•
a 4-type protector, which is equipped with a heat coil
•
a 3-type protector plus a separate sneak current protector
The 4-type protector is the preferred device. For installations not using primary protection, 4-type
protectors should always be used. When the 3-type protector is already installed, a separate sneak current
protector is required.
Figure notes
1 Locally Engineered Cables and Equipment
2 25-Pair Connector
3 Multi-Pair Protector Units (Primary
Protectors with Heat Coils or Equivalent
with Sneak Current Protection)
4 B25A Cable (Male to Female)
5 Concentrator Cable (WP90929 List 1)
6 356A Adapter
7 Out-of-Building Wiring
8 Out-Of-Building Analog Telephones
9 Part of Main Distribution Frame
(MDF)
10 Station Side
11 System Side
12 White Field
13 Purple Field
14 Cross-Connect Jumpers
15 Tip and Ring Wires
crdf24o CJL 101396
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7
1
9
10 11
12 13
14
15 16
2 2
4
4
4
4
6
6
5
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