[c-nsp] PRI to BRI Conversion with Cisco IAD

Chris Taylor chris.taylor at sac-corp.com
Tue Dec 27 10:40:31 EST 2011

Working on my first video teleconferencing project.



                Equipment I inherited; Polycom VSX 7000 with a BRI Interface
needs to interface and call out over a 3 Channel PRI ISDN Circuit.  Also
received a NT384 device (U Interface)  that doesn't seem to work over the
PRI circuit.


Is there a configuration that could be used with following IAD 2431 to
perhaps mux down the PRI channels to hand off a BRI interface to my VTC unit
(Polycom VSX 7000)



Cisco IOS Software, 2400 Software (C2430-IS-M), Experimental Version
12.4(20060718:201451) [acphan-V124_4_T2_1 104]

Copyright (c) 1986-2006 by Cisco Systems, Inc.

Compiled Tue 18-Jul-06 16:38 by acphan


ROM: System Bootstrap, Version 12.3(7r)T2, RELEASE SOFTWARE (fc1)


SAYRESVTC uptime is 2 minutes

System returned to ROM by power-on

System image file is "flash:c2430-is-mz.xo"


Cisco IAD2431 (R527x) processor (revision 4.1) with 119808K/11264K bytes of

Processor board ID FHK1045F11Y

R527x CPU at 225MHz, Implementation 40, Rev 3.1

1 On-Board Sixteen FXS Analog Voice Module V2.1

2 FastEthernet interfaces

2 Serial interfaces

1 Channelized T1/PRI port

DRAM configuration is 64 bits wide with parity disabled.

63K bytes of non-volatile configuration memory.

System fpga version is 250027

System readonly fpga version is 250025

Option for system fpga is 'system'.

62720K bytes of ATA System CompactFlash (Read/Write)

0K bytes of ATA Slot0 CompactFlash (Read/Write)


Configuration register is 0x2102



Any assistance is greatly appreciated.



Christopher Taylor | Sayres and Associates Corporation

IT Specialist


55 M Street SE, Suite 200, Washington, D.C., 20003

Phone: (202) 355-0922 x 2004 | Mobile: 571-218-2452 

E-Mail:  <mailto:chris.taylor at sac-corp.com> chris.taylor at sac-corp.com

 <http://www.sayresandassociates.com/> www.sayresandassociates.com

A Native American, Service-Disabled, Veteran-Owned Small Business


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