Inexpensive IP phone that supports IAX2 protocol as well as SIP and PoE.

The Citel C-4110 has two Ethernet ports that can be bridged or it can act as a gateway with DHCP, NAT, etc.

Spec Sheet: http://www.citel.com/Products/ip-phones/C4110-IP_PHONE_SPEC.pdf

Manual: http://www.citel.com/Products/ip-phones/c4110_manual.pdf

FAQ: http://www.citel.com/Products/faq.asp

Direct Access Systems Inc. 877-526-2125

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Update firmware first using web interface.

Get firmware here:

http://www.citel.com/Products/ip-phones.asp

Get IP Address of phone: Press the down arrow.

Basic → MMI Set

• Greeting Message (what's displayed)
• Time zone

Network → LAN

• Bridged Ethernet ports or NAT
• DHCP if NAT

VoIP → SIP

• Configure both SIP accounts (lines)

VoIP → IAX2

• Server IP
• Port (4569)
• Account Name (extension)
• Account Password
• Phone Number (extension)
• Voice Mail Number
  • shortcut key
    • ## for example
  • will dial Voice Mail Text
• Voice Mail Text (voicemail extension)
• Refresh Time
  • 120 seconds matches Asterisk default
    • 60 seconds may be better to keep NATed connection open
• Enable Register

Phone → DSP

• Signal Standard (US)

Phone → Function Key

• Line Key Setting
  • IAX2:Name (set both line keys?)
  • SIP1:Name1 (name is for you to identify)
  • SIP2:Name2

Phone → Function Key

• F1-F4
  • Voicemail, Park, Pickup, etc.
  • F1 = Memory Key = *97

This feature modifies dialled numbers.

Manual page 29.

Manual page 33.