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1 Install and cable a G600 cabinet
Install off-premises station wiring
124 S8100 Installation and Upgrades
November 2003
Figure 41: Connections to 24 out-of-building telephones
Circuit protectors
Both building entrances require carbon block or equivalent protection and sneak-current protection.
Provide this protection with a 4-type protector. The 4-type protector is equipped with a heat coil or a 3-
type protector plus a separate sneak-current protector.
The 4-type protector is the preferred device. For installations not using primary protection, always use 4-
type protectors. When the 3-type protector is already installed, a separate sneak-current protector is
required. The multipair protector units and the off-premises cabling must be locally engineered.
Connectorized multipair protector units (female 25-pair connector) are recommended.
Table 18, Analog line circuit protectors,
on page 125 shows the recommended protectors.
crdf24o RPY 01239
8
1
2 2
3
4
5
5
5
6
7
7
7
7
7
7
8
9
10
11
12
Figure notes
1 Locally engineered cables
2 Multipair protector units (primary protectors with
heat coils or equivalent with sneak-current
protection)
3 B25A cable
4 Concentrator cable (WP90929 List 1)
5 356A adapter
6 Out-of-building wiring
7 Out-of-building analog telephones
8 Part of MDF or patch panel
9 Station side (white field)
10 System side (purple field)
11 Cross-connect jumpers
12 To TN2183, TN769, TN742, or
TN746B Analog Line circuit pack