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Cortelco C58 IP Phone User Manual

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 SIP authentication

 none

 basic

 MD5

 DNS

 Peer to Peer/ IP call

 Automatic line selection

 9 Standard ring tones and 3 user-defined ring tones

 DTMF

 SIP info

 DTMF Relay (In-Band)

 RFC2833

 AUTO

 SIP applications

 Call Forward

 Call Transfer（Blind/Attended）

 Hold

 Call Waiting

 3 Way Conference

 SMS

 Remote Pickup

 Join Call

 Redial

 Unredial

 Multi-line

 Intercom

 BLF

 Presence

 Push to talk

 Auto Redial

 Call Back

 Call control features

 Flexible dial plan

 Hotline

 Anonymous Call Reject

 Black List (Reject Authenticated Call)

 Approved Caller List

 Limit Call

 Do Not Disturb

 Caller ID

 CLIR (reject anonymous call)

 CLIP(make anonymous call)

 Dial without Registration

 Phonebook 500 records

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