Instruction manual

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Features and Services
KD3 Direct Inward Dialing/Direct Outward
Dialing for Spain
The KD3 Direct Inward Dialing (DID)/Direct Outward Dialing (DOD) for
Spain feature is introduced to enable the Meridian 1 to meet the specifications
of the Spanish signaling protocol. Prior to the introduction of the KD3
interface, the only Central Office trunk support available in Spain from a
Meridian 1 perspective was an analog Central Office Trunk (COT) type of
interface (i.e., non Digital Trunk Interface (DTI) or DID/DOD).
Only KD3 to Meridian Customer Defined Network (MCDN) tandeming will
be supported (no other networking protocols will be supported at this time).
The KD3 interface utilizes the following:
Digital Interface
A 2.048 Mbit digital link physical interface conforming to International
Telegraph and Telephone Consultative Committee (CCITT) G700 series
specifications, and whose frame and multiframe structure conform to CCITT
recommendations G732 and G734, is specified.
Multifrequency Interregister Signaling
A Multifrequency Interregister Signaling protocol is used for passing certain
information such as addressing and Call Class. It is similar to Multifrequency
Extended (MFE), but must support both 2/5 or 2/6 frequency encoding on a
system basis. It also uses different signals, and adds several new timing
parameters. The new signals are mainly used to provide Class of Call
information, broken down as Regular Subscriber, Special Services, National
and International calls.
For more information on KD3 Signaling, please see the KD3 Signaling
document contained in the IPE supplement for Spain.