Matrix Telecom ETERNITY NE - Calling Line Identification and Presentation (CLIP)

Matrix ETERNITY NE System Manual 737
Calling Line Identification and Presentation (CLIP)
SARVAM UCS provides the facility of detecting the caller's number and presenting it on the display of the called
extension phone. This feature is called Calling Line Identification and Presentation (CLIP).
The calling number can be presented on the Extended IP Phones. The calling number can also be presented on
SLTs that support CLI protocols.
The signaling protocols for CLI supported by SARVAM UCS are: DTMF, FSK V.23, and FSK-Bellcore.
These protocols are supported on trunks as well as extensions. Any type of trunk line and supporting DTMF or FSK
signaling can be interfaced with SARVAM UCS.
Similarly, any type of telephone instrument supporting DTMF or FSK signaling protocol can be connected to the
SLT port.
How it works
When CLIP is enabled on a trunk,
• SARVAM UCS senses the digits/codes sent by the network.
• It sends this information to the landing extension/Operator along with the ringing signal.
• In case of, Internal calls the calling extension's name and number both are presented to the called
extension.
• In the case of External calls, only the number will be displayed on the landing/Operator extension.
• When the landing extension/Operator transfers the incoming call to an extension, putting the external
caller on hold, the system sends this information to the extension to which the call is transferred.
• During the transfer, the number of the landing extension/Operator will be displayed on the transfer
destination extension.
• On successful call transfer, the caller's number will be displayed on the transfer destination extension.
In the case of Call Transfer, the system also provides the option of displaying to the destination extension either the
number of the party that is put on hold to be transferred, that is, the Held Party OR the number of the Transferring
Party, while the call transfer is taking place. This feature is called Caller ID Presentation while Transfer.
It is also possible to remove and replace the '+' character received as CLI on telephones that do not support CLIP
starting with this character.
For example, the mobile network sends the calling party number with '+' as the prefix. If the telephone connected as
extension does not support this, it will not present the CLI of the caller. To overcome this, SARVAM UCS provides
you the option of replacing '+' with an appropriate number string which these telephones can display.
CLIP and Caller ID Presentation on Call Transfer will work only if CLIR is not enabled on the extension that
has transferred the call. Refer the topic “Calling Line Identity Restriction (CLIR)”.