Cisco CP-7911G-CH1 Administration Guide - Page 96
Configuring Dual-Line Phones, SUMMARY STEPS
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How to Set Up Cisco Unified IP Phones Setting Up Cisco Unified IP Phones using SCCP Configuring Dual-Line Phones Dual-line phone configuration is required for dual-line phone operation during Cisco Unified CM fallback, see the "Enabling Consultative Call Transfer and Forward Using H.450.2 and H.450.3 with Cisco SRST 3.0" section on page 148. Dual-line IP phones are supported during Cisco Unified CM fallback using the max-dn command. Dual-line IP phones have one voice port with two channels to handle two independent calls. This capability enables call waiting, call transfer, and conference functions on a phone-line button. In dual-line mode, each IP phone and its associated line button can support one or two calls. Selection of one of two calls on the same line is made using the blue Navigation button located below the phone display. When one of the dual-line channels is used on a specific phone, other phones that share the ephone-dn will be unable to use the secondary channel. The secondary channel will be reserved for use with the primary dual-line channel. It is recommended that hunting be disabled to the second channel. For more information, see the "Configuring Dial-Peer and Channel Hunting" section on page 144. SUMMARY STEPS 1. call-manager-fallback 2. max-dn max-directory-numbers [dual-line] [preference preference-order] 3. exit Cisco Unified SCCP and SIP SRST System Administrator Guide 96 OL-13143-04
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