Adsl On The Motherboard; Dsp Firmware; Adsl Data Framing; Atm Support - Enterasys Security Router X-PeditionTM User Manual

Features

ADSL on the Motherboard

Two versions of ADSL are provided by the XSR Series 1200 routers:
• Annex A over POTS on the XSR-1220
• Annex B over ISDN on the XSR-1235

DSP Firmware

Digital Signal Processing (DSP) firmware, which the XSR's onboard ADSL modem uses to
communicate with your provider's Digital Subscriber Line Access Multiplexer (DSLAM), is stored
in the
Series routers (it is embedded on the motherboard on XSR Series 1200 routers). When inserted into
the Compact Flash slot - upon first configuring an ATM interface - the XSR's ADSL driver copies
adsl.fls
ATM interfaces are deleted,
Several CMV commands are provided to "train" the DSP if necessary although it is recommended
they be used by Enterasys field personnel only. The
DSP training list and the
read and write variables to the DSP, respectively,
print

ADSL Data Framing

The XSR supports the ATM Frame UNI (FUNI) mode of data framing on an ADSL line, as defined
by ATM Forum document TR-003.
ATM Frame UNI is a derivative of ATM Data Exchange Interface. Framing is a member of the
HDLC family of data link protocols and, in the XSR, uses the same number of header bytes. It uses
standard HDLC start and stop flag bytes to guarantee flag recognition and bit-stuffing to achieve
data transparency. The ATM FUNI frame header contains address and control fields. The address
field encodes the Service Data Unit's (SDU) virtual connection VPI and VCI.

ATM Support

Virtual Circuits

ADSL supports up to 30 ATM Permanent Virtual Circuits (PVCs) over one virtual circuit number.
PVCs are configured with the
According to DSL Forum document TR-008, the ADSL interface, by default, provisions a single
permanent virtual circuit for data traffic as follows:
• VPI = 1
• VCI = 32
You may configure a different virtual circuit for data traffic.
A second circuit is reserved as the Vendor Specific Channel, as follows:
• VPI = 1
• VCI = 33
13-6 Configuring ADSL
adsl.fls file on a CompactFlash card shipped with the ADSL NIM on XSR 1800 and 3000
into host memory where it will remain available for use on demand. Be aware that if all
adsl.fls
cmv clear
outputs them to the console, and
must be recopied.
cmv append
command removes all of them. Also,
cmv delete
cmv save
copies them to a file.
pvc vpi/vci command.
command adds variables to the
cmv cr and
removes them individually,
cmv cw
cmv