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Dialin solution via isdn and digital modems does not work - Cisco 3640

sbreuercc
Level 1
Level 1

Hi there,

i have here some old 3640, that was running before with an old isdn multiplexer for a dialin solution.

Due to that only a few users use this dialin, the expensive isdn multiplexer is no longer needed and now a 4 Port BRI Card is inside.

The problem is actually, that the isdn dialin works but not the dialin for analog users (via the digital modems)

System and IOS:

cisco 3640 (R4700) processor (revision 0x00) with 60416K/5120K bytes of memory.

4 ISDN Basic Rate interface(s)

18 terminal line(s)

IOS (tm) 3600 Software (C3640-IS-M), Version 12.2(46a),

config with PRI (E1 Controller before)

controller E1 2/0

pri-group timeslots 1-31

!

controller E1 2/1

!

!

!

interface Loopback1

description >>>Loopback for Dialer 10-30<<<

ip address 192.168.5.1 255.255.255.0

!

interface Loopback10

ip address 10.1.1.1 255.255.255.0

!

interface Ethernet0/0

description > internal Network <

ip address 172.16.1.11 255.255.255.0

no ip redirects

ip nat inside

full-duplex

!

interface Serial2/0:15

description > S2M Dial-backup <

ip unnumbered Loopback1

encapsulation ppp

no logging event link-status

load-interval 30

no keepalive

dialer idle-timeout 3600

dialer enable-timeout 3

dialer-group 1

no snmp trap link-status

isdn switch-type primary-net5

isdn incoming-voice modem

isdn send-alerting

peer default ip address pool isdn

no fair-queue

no cdp enable

ppp callback accept

ppp authentication ms-chap chap pap callin s2000

ppp multilink

!

interface Group-Async1

description connected to Dial-inPCs(modem)

ip unnumbered Loopback1

encapsulation ppp

no ip split-horizon

ip tcp header-compression

no ip mroute-cache

dialer in-band

dialer idle-timeout 36000

async mode dedicated

peer default ip address pool analog

no fair-queue

pulse-time 1

ppp authentication ms-chap chap pap callin s2000

group-range 97 114

!

ip local pool isdn 172.25.20.33 172.25.20.62

ip local pool analog 172.25.20.65 172.25.20.91

Config with BRI (after)

isdn switch-type basic-net3

interface Loopback1

description >>>Loopback for Dialer 10-30<<<

ip address 192.168.5.1 255.255.255.0

!

interface Loopback10

ip address 10.1.1.1 255.255.255.0

!

          interface Ethernet0/0

ip address 172.16.1.11 255.255.255.0

no ip redirects

ip nat inside

full-duplex

!

!

interface BRI2/0

description > ISDN 1 <

ip unnumbered Loopback1

encapsulation ppp

no logging event link-status

load-interval 30

no keepalive

dialer idle-timeout 3600

dialer enable-timeout 3

dialer-group 1

no snmp trap link-status

isdn switch-type basic-net3

isdn incoming-voice modem

isdn send-alerting

peer default ip address pool isdn

no fair-queue

no cdp enable

ppp callback accept

ppp authentication ms-chap chap pap callin s2000

ppp multilink

          !

interface BRI2/1

description > ISDN 2 <

ip unnumbered Loopback1

encapsulation ppp

no logging event link-status

load-interval 30

no keepalive

dialer idle-timeout 3600

dialer enable-timeout 3

dialer-group 1

no snmp trap link-status

isdn switch-type basic-net3

isdn incoming-voice modem

isdn send-alerting

peer default ip address pool isdn

no fair-queue

no cdp enable

ppp callback accept

ppp authentication ms-chap chap pap callin s2000

ppp multilink

!

interface BRI2/2

description > empty <

ip unnumbered Loopback1

encapsulation ppp

no logging event link-status

load-interval 30

no keepalive

shutdown

dialer idle-timeout 3600

dialer enable-timeout 3

dialer-group 1

           no snmp trap link-status

isdn switch-type basic-net3

isdn incoming-voice modem

isdn send-alerting

peer default ip address pool isdn

no fair-queue

no cdp enable

ppp callback accept

ppp authentication ms-chap chap pap callin s2000

ppp multilink

!

interface BRI2/3

description > empty <

ip unnumbered Loopback1

encapsulation ppp

no logging event link-status

load-interval 30

no keepalive

shutdown

dialer idle-timeout 3600

dialer enable-timeout 3

dialer-group 1

no snmp trap link-status

isdn switch-type basic-net3

isdn incoming-voice modem

isdn send-alerting

peer default ip address pool isdn

no fair-queue

no cdp enable

ppp callback accept

ppp authentication ms-chap chap pap callin s2000

ppp multilink

!

          interface Group-Async1

description connected to Dial-inPCs(modem)

ip unnumbered Loopback1

encapsulation ppp

no ip split-horizon

ip tcp header-compression

no ip mroute-cache

dialer in-band

dialer idle-timeout 36000

async mode dedicated

peer default ip address pool analog

no fair-queue

pulse-time 1

ppp authentication ms-chap chap pap callin s2000

group-range 97 114

!

ip local pool isdn 172.25.20.33 172.25.20.62

ip local pool analog 172.25.20.65 172.25.20.91

here is the debug output

Mar 16 11:44:31: CCBRI_Go Fr L3 pkt (Len=41) :

Mar 16 11:44:31: 5 1 8C 90 A1 4 3 90 90 A3 18 1 89 1E 2 80 83 6C C 21 83 32 31 30 32 39 34 39 36 37 33 70 8 C1 31 33 35 30 36 32 30

Mar 16 11:44:31:

Mar 16 11:44:31: ISDN BR2/0: Incoming call id = 0x000D, dsl 16

Mar 16 11:44:31: ISDN BR2/0: LIF_EVENT: ces/callid 1/0xD HOST_INCOMING_CALL

Mar 16 11:44:31: ISDN BR2/0: HOST_INCOMING_CALL: (non-POTS) VOICE

Mar 16 11:44:31: ISDN BR2/0: HOST_INCOMING_CALL: (1) call_type = VOICE

Mar 16 11:44:31: ISDN BR2/0: HOST_INCOMING_CALL: voice_answer_data = FALSE call type is VOICE ALAW

Mar 16 11:44:31: ISDN BR2/0: Event: Received a VOICE call from <CALLER-NUMBER-DELETED> on B1 at 64 Kb/s

Mar 16 11:44:31: ISDN BR2/0: Event: Accepting the call id 0xD

Mar 16 11:44:31: ISDN BR2/0: RM returned call_type 1 resource type 0 response 1

Mar 16 11:44:31: CCBRI_Go Fr Host InPkgInfo (Len=9) :

Mar 16 11:44:31: 7 10 1 0 D 3 18 1 89

Mar 16 11:44:31:

Mar 16 11:44:31: BRI2/0:1: Enabled channel B1

Mar 16 11:44:31: BRI2/0: Wrote command 0x14 to SID

Mar 16 11:44:31: ISDN BR2/0: VOICE_ANS Event:  call id 0xD, bchan 0, ces 1

Mar 16 11:44:31: ISDN BR2/0: isdn_send_connect(): msg 4, call id 0xD, ces 1 bchan 0, call type VOICE

Mar 16 11:44:31: CCBRI_Go Fr Host InPkgInfo (Len=6) :

Mar 16 11:44:31: 3 10 1 0 D 0

Mar 16 11:44:31:

Mar 16 11:44:31: CCBRI_Go Fr Host InPkgInfo (Len=6) :

Mar 16 11:44:31: 4 10 1 0 D 0

Mar 16 11:44:31:

Mar 16 11:44:31: CCBRI_Go Fr L3 pkt (Len=4) :

Mar 16 11:44:31: F 1 8C 92

Mar 16 11:44:31:

Mar 16 11:44:31: ISDN BR2/0: LIF_EVENT: ces/callid 1/0xD HOST_CONNECT

Mar 16 11:44:31: ISDN: get_isdn_service_state(): idb 0x61FBAAC0 bchan 2 is_isdn 1 Not a Pri

Mar 16 11:44:31: ISDN BR2/0: Event: Connected to <CALLER-NUMBER-DELETED> on B1 at 64 Kb/s

Mar 16 11:45:12: CCBRI_Go Fr L3 pkt (Len=12) :

Mar 16 11:45:12:

Mar 16 11:45:12: 45 1 8C 96 8 2 80 90 1E 2 82 88

Mar 16 11:45:12: ISDN BR2/0: LIF_EVENT: ces/callid 1/0xD HOST_DISCONNECT

Mar 16 11:45:12: ISDN BR2/0: Event:  Call to <unknown> was hung up.

Mar 16 11:45:12: ISDN BR2/0: process_disc_ack(): call id 0xD, ces 1, call type VOICE cause 0x0

Mar 16 11:45:12: ISDN: get_isdn_service_state(): idb 0x61FBAAC0 bchan 2 is_isdn 1 Not a Pri

Mar 16 11:45:12: CCBRI_Go Fr Host InPkgInfo (Len=10) :

Mar 16 11:45:12: 6 10 1 0 D 0 8 2 0 8

Mar 16 11:45:12:

Mar 16 11:45:12: ISDN BR2/0: VOICE_HANGUP Event: call id 0xD, bchan 0, ces 1, cause 0x10

Mar 16 11:45:12: ISDN BR2/0: Event: Voice hangup call to call id 0xD

Mar 16 11:45:12: BRI2/0:1: Disabled channel B1

Mar 16 11:45:12: BRI2/0: Wrote command 0x15 to SID

Mar 16 11:45:12: CCBRI_Go Fr L3 pkt (Len=4) :

Mar 16 11:45:12: 5A 1 8C 99

Mar 16 11:45:12:

Mar 16 11:45:12: ISDN BR2/0: LIF_EVENT: ces/callid 1/0xD HOST_DISCONNECT_ACK

Mar 16 11:45:12: ISDN: get_isdn_service_state(): idb 0x61FBAAC0 bchan 2 is_isdn 1 Not a Pri

Mar 16 11:45:12: ISDN BR2/0: HOST_DISCONNECT_ACK: call type is VOICE

Mar 16 11:45:12: ISDN BR2/0: HOST_DISCONNECT_ACK: VOICE ERROR: NULL VDEV Common(0xFC): bchan 0, call id D

4 Replies 4

lgijssel
Level 9
Level 9

Really old stuff but it should still work.

Is the modem module still in slot 3?

Lines configured like below?

line 97-114

! --- This must match the group-range in the Group-Async Interface
! --- Use the show line command to determine which lines are to be configured for dialin

autoselect during-login
autoselect ppp
modem Dialin

Please check the rest of the prerequisites listed in the link:

http://www.cisco.com/en/US/tech/tk801/tk379/technologies_configuration_example09186a0080093c6e.shtml#background

regards,

Leo

Hi Leo,

the lines are matching with the lines specified in the Async intfce. as you can see below.

line 97 114

script modem-off-hook offhook

           script callback callback

modem autoconfigure type mica

exec-character-bits 8

special-character-bits 8

transport preferred none

no ip tcp input-coalesce-threshold

autoselect during-login

autoselect ppp

hold-character 0

i added in the actual config the "modem dialin" command to the lines 97 114.

Let's see if this helps.

Cheers


Hi,

I have the same problem - how did you resolve that issue?

Regards,

Hi,

the problem was never solved.

The BRI was not able to speak with the digital modem card/module, maybe there was some problem with the eeprom software version on the BRI.

BR

stefan

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