Alcatel-Lucent 1000 adsl User Manual

ATM devices in the network. An end-to-end connection is established by linking

the virtual connections between devices. This requires all intermediate ATM

devices to have VPI/VCI assignments.

For the ATM network, these assignments are the responsibility of network

operators. These operators configure ATM devices to provide a Permanent Virtual
Connection (PVC) through the network. The PVC provides an always-on service.

Once the ADSL modem is connected to the subscriber line, an end-to-end

connection can be established.

A

A

A

T

T

T

M

M

M

-

-

-

F

F

F

o

o

o

r

r

r

u

u

u

m

m

m

 

 

 

I

I

I

n

n

n

t

t

t

e

e

e

r

r

r

f

f

f

a

a

a

c

c

c

e

e

e

If terminal equipment is connected to the modem’s ATMF-25 port, ATM service is

delivered to the PC. This means ATM cells from applications on the PC are

captured by the ATMF interface and cross-connected or switched to the ADSL

line.

An ATMF-25.6 PC-NIC is required to terminate the ATM connections in the PC.
The PC-NIC must support encapsulations and protocols described in RFC 1483

and RFC 2364.

The virtual channels cross-connected in the ADSL modem between the ATMF

interface and the ADSL line can have VPI/VCI values listed in table E. A
connection is possible only if the PC-NIC is sending and receiving ATM cells on

one (or more) of these virtual channels.

 

VPI

0-5

Virtual Path Identifier

VCI

0-65535

Virtual Channel Identifier

E

E

E

t

t

t

h

h

h

e

e

e

r

r

r

n

n

n

e

e

e

t

t

t

 

 

 

I

I

I

n

n

n

t

t

t

e

e

e

r

r

r

f

f

f

a

a

a

c

c

c

e

e

e

The Ethernet interface terminates ATM connections, extracting frames from
arriving cells and encapsulating frames in departing cells. Only those frames

supported by the modem are extracted or encapsulated. Table F lists the

supported encapsulations and VPI/VCI values based on connection type.