NO Carrier !

[tauseef]

Hi,

Am trying to establish a Analogue Dialin to my Cisco 2620 Router having NM-8AM module.

Using an External US Robotics Fax Modem for Connectivity from my remote client.

I do not get through and just get a irritating noise which I presume is trying to connect but do not get any success.

Please let me know where I am stuck up !

SH_RAS#sh conf

Using 918 out of 29688 bytes

!

version 12.2

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname SH_RAS

!

!

username abc password 0 abc

ip subnet-zero

!

!

no ip domain-lookup

ip domain-name cisco.com

!

async-bootp dns-server 130.0.0.1

!

!

!

interface FastEthernet0/0

ip address 130.0.0.250 255.255.0.0

speed auto

half-duplex

!

interface Group-Async1

ip unnumbered FastEthernet0/0

encapsulation ppp

dialer in-band

dialer idle-timeout 600

dialer-group 1

async mode interactive

peer default ip address pool DIALIN

ppp authentication chap

group-range 33 40

!

ip local pool DIALIN 130.0.0.200 130.0.0.207

ip classless

ip http server

ip pim bidir-enable

!

!

dialer-list 1 protocol ip permit

!

line con 0

password abc

line 33 40

login local

modem InOut

modem autoconfigure discovery

transport input all

autoselect ppp

stopbits 1

flowcontrol hardware

line aux 0

line vty 0 4

!

!

end

SH_RAS#

DEBUG on Modem gives me the following output :

er

03:15:13: Modem 1/2 Mcom: in modem state 'Idle'

03:15:32: Modem 1/2 Mcom: in modem state 'Dialing/Answering'

03:15:33: Modem 1/2 Mcom: in modem state 'Incoming ring'

03:15:35: Modem 1/2 Mcom: in modem state 'Waiting for Carrier'

03:16:34: Modem 1/2 Mcom: in modem state 'Disconnecting'

03:16:34: Modem 1/2 Mcom: DISCONNECT, duration = 00:00:00, reason (0x2) No carri

er

03:16:35: Modem 1/2 Mcom: in modem state 'Idle'

[tauseef]

Hi Mak,

Tried connecting to a simple POTS Phone instrument and it seems to be dialing perfectly fine without any hitch.

I think the Chassis is grounded correctly.

This is a very new Setup !

Just configuring for All 8 LInes dialin.

Am I missing anything in the Setup config.

Thanx !

[zahmed]

Tauseef, your config is fine. I would, however, remove "modem autoconfigure discovery" and make stopbits 2.

Also as Mak stressed, grounding of the router chassis is extremely necessary. Please double check into that.

~Zulfi

[tauseef]

Zulfi,

Stopbits 2 may not quite work as my modem is configured for Stopbits 1. I would have tried Mak's option of changine the NM-8AM but its not right away available.

The Router I have is a 2620 so only One slot so not much in luck there too.

Thanx a ton guys. Have been really supportive.

Will let you know of any Progress.

Tauseef

[makchitale]

I did some research into previous TAC cases where we had similar issue reported & the debug outputs looked the same:

03:16:34: Modem 1/2 Mcom: DISCONNECT, duration = 00:00:00, reason (0x2) No carrier

Most of then were resloved by hardware replacement (NM-xAM).

1)Try moving te same NM-xAM card to another slot or if possible into another chassis & see if it works or not.

2) Try replacing the NM-xAM card.

Thanks, Mak.

[makchitale]

1. Remove the phone line going to the NM-xAM & connect to a simple POTS phone instrument, call from the remote end, does the phone ring?

2. Try reverse telnetting into the modem, telnet 130.0.0.250 <2000+line number>. Try making call out to any phone number (ATDTxxxxxx) & see if it rings the called phone?

3. This call, as shown in the debugs landed on ½; do we see the same issue on other modems as well?

4. Ensure that the chassis is grounder correctly (very important)

5. Was this ever working before or it a new install?

Thanks, Mak.