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Webcast-Catalyst9k
New Member

ISDN Pri and Bri Remote Access

Hi.

We have a 3640 router used as access-server.

It's connected to an ISDN Pri line, and all works properly.

Now we need Pri line for other purposes, and our RAS users are very few.

So we have attached router to a BRI connection, and configured this to achieve same work (remote access connection).

But this doesn't work, when we try to connect from a PC to the BRI line, error is:

cisco3640#

00:03:22: ISDN BR2/0: RX <- SETUP pd = 8 callref = 0x6E

00:03:22: Bearer Capability i = 0x9090A3

00:03:22: Channel ID i = 0x8A

00:03:22: Progress Ind i = 0x8083 - Origination address is non-ISDN

00:03:22: Calling Party Number i = 0x00, 0xA3, Plan:Unknown, Type:Unknown

00:03:22: Called Party Number i = 0xA1, '1119520806', Plan:ISDN, Type:National

00:03:22: High Layer Compat i = 0x9181

30064771072:00:12884901888: ISDN BR2/0: Event: Received a VOICE call from <unknown> on B2 at 64 Kb/s

30064771072:00:12884901888: ISDN BR2/0: Event: Accepting the call id 0x3

00:03:22: ISDN BR2/0: TX -> CALL_PROC pd = 8 callref = 0xEE

cisco3640#

00:03:22: Channel ID i = 0x8A

00:03:22: ISDN BR2/0: TX -> ALERTING pd = 8 callref = 0xEE

00:03:22: ISDN BR2/0: TX -> DISCONNECT pd = 8 callref = 0xEE

00:03:22: Cause i = 0x8090 - Normal call clearing

00:03:22: ISDN BR2/0: RX <- RELEASE pd = 8 callref = 0x6E

00:03:22: Cause i = 0x8090 - Normal call clearing

00:03:22: ISDN BR2/0: TX -> RELEASE_COMP pd = 8 callref = 0xEE

configuration is the same for both lines:

interface Loopback1

ip address 192.168.70.1 255.255.255.0

no ip unreachables

!

interface Serial1/0:15

ip unnumbered Loopback1

no ip unreachables

encapsulation ppp

ip tcp header-compression passive

dialer pool-member 1

isdn switch-type primary-net5

isdn incoming-voice modem

no fair-queue

no cdp enable

ppp callback permit

ppp authentication chap dial-in

!

interface BRI2/0

ip unnumbered Loopback1

no ip unreachables

encapsulation ppp

ip tcp header-compression passive

dialer pool-member 1

isdn switch-type basic-net3

isdn incoming-voice modem

no peer default ip address

no fair-queue

no cdp enable

ppp callback permit

ppp authentication chap dial-in

!

interface Virtual-Template1

ip unnumbered Loopback1

no ip unreachables

peer default ip address pool ftp

ppp callback permit

ppp authentication chap dial-in

!

interface Group-Async1

ip unnumbered Loopback1

no ip unreachables

encapsulation ppp

no ip route-cache

ip tcp header-compression

no ip mroute-cache

keepalive 10

async default routing

async mode interactive

peer default ip address pool ftp

ppp callback permit

ppp authentication chap dial-in

group-range 1 24

!

We have tried to change ios to last release yet.

thanks a lot for any suggestions.

Daniele

6 REPLIES
Hall of Fame Super Gold

Re: ISDN Pri and Bri Remote Access

Daniele

I believe that the issue is that while the PRI was able to accept both digital and analog calls, the BRI is accepting only digital calls. The incoming call is not digital as shown in this output:

Origination address is non-ISDN

and in this output:

ISDN BR2/0: Event: Received a VOICE call from on B2 at 64 Kb/s

HTH

Rick

New Member

Re: ISDN Pri and Bri Remote Access

Thanks for your suggestion.

I've tried without PRI card, but it doesn't work. Error message is:

cisco3640#

21:10:57: ISDN BR2/0: RX <- SETUP pd = 8 callref = 0x71

21:10:57: Sending Complete

21:10:57: Bearer Capability i = 0x8090A3

21:10:57: Channel ID i = 0x8A

21:10:57: Calling Party Number i = 0x00, 0xA3, Plan:Unknown, Type:Unknown

21:10:57: Called Party Number i = 0xA1, '1119520806', Plan:ISDN, Type:National

21:10:57: Sending Complete

21:10:57: ISDN BR2/0: Event: Received a VOICE call from on B2 at 64 Kb/s

21:10:57: ISDN BR2/0: Event: Accepting the call id 0x6

Jan 13 13:53:27.473: %CSM-1-HWREV: The T1 or E1 network module is incompatible with the digital modems: MODEM_REPORT

cisco3640#

21:10:57: ISDN BR2/0: TX -> CALL_PROC pd = 8 callref = 0xF1

21:10:57: Channel ID i = 0x8A

21:10:57: ISDN BR2/0: TX -> DISCONNECT pd = 8 callref = 0xF1

21:10:57: Cause i = 0x80AC - Requested circuit/channel not available

21:10:57: ISDN BR2/0: RX <- RELEASE pd = 8 callref = 0x71

21:10:57: Cause i = 0x8090 - Normal call clearing

21:10:58: ISDN BR2/0: TX -> RELEASE_COMP pd = 8 callref = 0xF1

cisco3640#

Do I have to reconfigure micamodem?

New Member

Re: ISDN Pri and Bri Remote Access

This is the error now:

cisco3640#

00:03:59: ISDN BR2/0 Q931: RX <- SETUP pd = 8 callref = 0x11

Sending Complete

Bearer Capability i = 0x8090A3

Standard = CCITT

Transfer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0x8A

Calling Party Number i = 0x00A3, N/A

Plan:Unknown, Type:Unknown

Called Party Number i = 0xA1, '1119520806'

Plan:ISDN, Type:National

Sending Complete

00:03:59: ISDN BR2/0 **ERROR**: accept_incoming_csm_call: modem problem Requested circuit/channel not available(0x2C): b channel 1, call id 0x6

00:03:59: ISDN BR2/0 Q931: TX -> CALL_PROC pd = 8 callref = 0x91

Channel ID i = 0x8A

cisco3640#

00:03:59: ISDN BR2/0 Q931: TX -> DISCONNECT pd = 8 callref = 0x91

Cause i = 0x80AC - Requested circuit/channel not available

00:03:59: ISDN BR2/0 Q931: RX <- RELEASE pd = 8 callref = 0x11

Cause i = 0x8090 - Normal call clearing

00:03:59: ISDN BR2/0 **ERROR**: host_disconnect_ack: VOICE ERROR: Invalid CSM info(0xFB): b channel 1, call id 0x6

00:03:59: ISDN BR2/0 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x91

cisco3640#unde all

All possible debugging has been turned off

Hall of Fame Super Gold

Re: ISDN Pri and Bri Remote Access

Hi,

do you have "modem dialin" and "no exec under" line xx-yy ?

New Member

Re: ISDN Pri and Bri Remote Access

Yes I have.

And Remote Access from Primary ISDN line work properly.

This error come on only if I try to connect from BRI lines.

Is it possible that Pri use modems and take them not possible to use anyway?

Hall of Fame Super Gold

Re: ISDN Pri and Bri Remote Access

What is the WIC HW revision ? check "show diag". There is a minimum to work with the DM.

By coincidence, just yesterday I prepared such a configuration, and it was working fine.

But I didn't had a PRI card in router.

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