Cortelco C56 user manual  Dns

DNS

Peer to Peer/ IP call

Automatic line selection

9 Standard 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

Redial

paging

Intercom

Auto Redial

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

Incoming Calls

Outgoing Calls

Missed Calls

Max of 300 Records Each

Supports vCard/XML/CSV

4 DSS keys

Time Display

12/24 Hour

Support Daylight Saving Time

Supports Path, Group

Supports SIP Privacy

Supports MWI

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