Common ISDN Access Profile (CIP)
CIP defines how ISDN signaling can be transferred via a Bluetooth wireless connection. CIP provides unrestricted access to the services, data and signaling that ISDN offers.
Usage Scenarios
Commonly used in Bluetooth enabled ISDN access points (office equipment).
Example Products
Here are a few examples of the types of devices that you might find using the CIP:
- Laptop
- Access point
- PC
- Handheld Cordless Phone
Getting Technical
The CIP defines two roles, that of an Access Point (AP) and an ISDN Client (IC).
- Access Point (AP) – Acts as a terminal endpoint from the external network point of view and handles all interworking towards that network.
- ISDN Client (IC) – The IC is the client that accesses the AP wireless and may offer CAPI to the user.
The purpose of the Common ISDN Access Profile (CIP) is as follows:
- To define how applications shall access ISDN over Bluetooth technology
- To allow wherever possible unrestricted access to services, data or signaling provided by ISDN
- To ensure that legacy ISDN applications do continue to work without any modification inside that application itself
- To define how the ISDN access co-exists with Bluetooth specifications that possibly access ISDN in one way or another
- To show how ISDN over Bluetooth technology can co-exist with existing ISDN in one application
This profile defines the requirements for each of the layers in the protocol model (to the left) for the CIP.
The Baseband, LMP, and L2CAP are the lower layer Bluetooth protocols.
SDP is the Bluetooth Servie Discovery Protocol.
CMTP is the CAPI Mesage Transport Protocol.
CAPI stands for Common ISDN Application Programming Interface.
The CAPI Message Gateway (CMG) is an optional, functional entity. Itspresentation here only depicts the routing of the CAPI Messages between theBluetooth protocol stack and the ISDN protocol stack with the OSI layer 1 to 3for the ISDN B- and D-Channels. The CMG is a manufacturer dependent pieceof software and out of scope in this profile.
Need more? View the Common ISDN Access Profile (CIP) 1.0.
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