PEB2096HV31XT Lantiq, PEB2096HV31XT Datasheet - Page 33

• Manufacturer Part Number: PEB2096HV31XT
• Manufacturer: Lantiq

Specifications of PEB2096HV31XT

• Control Interface: HDLC
• Lead Free Status / Rohs Status: Supplier Unconfirmed

3.7
Decentralized D-Channel processing can be realized by the use of only one multiplexed
HDLC-Controller, which is integrated with a D-channel Arbiter in the ELIC, PEB 20550.
Typically the D-channel load has a very bursty characteristic. Taking this into account,
the ELIC provides the capability to multiplex one HDLC-controller among several
subscribers. This feature results in a drastical reduction of hardware requirements while
maintaining all benefits of HDLC based signaling (Figure 3-4).
A D-channel arbiter is used to assign the receive and transmit HDLC-channels
independently to the subscriber terminals.
In downstream direction the arbiter links the transmit channel to one or more (broadcast)
programmable IOM-2 D-channels (ports).
In upstream direction the arbiter assigns the HDLC-receive channel to a requesting
subscriber and indicates to all other subscribers that their D-channels are blocked, using
a control channel.
This configuration supports full duplex layer-2 protocols with bus capability e.g. LAPD or
proprietary implementations. Consequently no polling overhead is necessary providing
the full 16-kbit/s bandwidth of the D-channel for data exchange.
•
Figure 3-4
Data Sheet
D-Channel Handling
IOM -2
Interface
µP
(SACCO-A)
D-Channel Handling with only one Multiplexed HDLC-Controller
R
D Channel
SACCO CH-A
SACCO CH-B
3-5
B Channels
ARBITER
D Channel
Controlling
ELIC
EPIC
R
R
ITS05808
Operational Description
PCM
Highway
Signaling
Highway
PEB 2096
04.99