AT&T System 85 manual 374

8110 and 8110M Telephones

Power Requirements

It is recommended that the 8110 and 8110M telephones have auxiliary power (9V DC, 100 mA) to improve the performance of the speakerphone under the following conditions:

Note: Use with the TN746 circuit pack requires auxiliary power (in the form of a power adapter) at all loop lengths. On System 85 and DEFINITY G2, the line must be administered as Data Restricted to allow for the automatic disconnect feature.

	When loop length exceeds:
If you are using:	16,000 feet (22 gauge)
Circuit Pack TN742	10,000 feet (24 gauge)
Circuit Pack TN769	6,300 feet (26 gauge)
	or
	When loop resistance exceeds 256 ohms
	or
	When loop current is less than 26 mA
	When loop length exceeds:
If you are using:	11,000 feet (22 gauge)
Circuit Pack SN229	7,000 feet (24 gauge)
	4,400 feet (26 gauge)
	or
	When loop resistance exceeds 180 ohms
	or
	When loop current is less than 26 mA
Any installation	When loop current is less than 26 mA
Any installation	When another analog telephone is bridged
	with the 8110 or 8110M telephone

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