ADTRAN TELEPHONE CONNECTION L128T ONLY Basic Telephone Service, Supplementary Services

Chapter 2: Installation

TELEPHONE CONNECTION (L128T ONLY)

Basic Telephone Service

The Express L128T supports an analog DTMF telephone type (AT&T 2500) with the POTS interface, part number 1202070L2. Two telephones or other an- alog devices (like a fax machine or modem) plug into either RJ-11 jack (labeled with drawings of telephones) on the rear of the unit. Using a multipoint line allows the POTS and data port to have unique phone numbers.

Supplementary Services

Supplementary services such as call holding, three- or six-way conferencing, call transfer, and call waiting are fully supported by the Express L128/L128T on a touch-tone telephone. Table 2-A explains how the flash-hook is used for handling multi-call situations.

DTMF Keypad

The following functions are performed on a touch-tone phone:

•	Disable call waiting:	Press **0
•	Enable call waiting:	Press **1
•	Redial last number:	Press **5
•	Enable ExpertISDN:	Press **6
•	Enter Area Code:	Press **7XXX
		(where XXX is a 3-digit area code.
		This must be entered first, before
		enabling ExpertISDN.)
• Enter Phone Number 1:		Press **8XXXXXXX
		(where XXXXXXX is the 7- digit
		phone number. This must be entered
		before enabling ExpertISDN.)
• Enter Phone Number 2:		Press **9XXXXXXX
		(where XXXXXXX is the 7-digit
		phone number. If only one phone
		number is assigned, this does not have
		to be entered.)

22 Express L128/L128T User Manual 61202.070L1-1