can't dial in c3725 with NM-16AM internal modems

ali-bou.cisco · ‎09-08-2004

I have cisco c3725 with NM-16AM configured as an access server but i can't dial in, when i debug the modem i have the following:

'dialing/anwering'

'Incoming ring'

'Waiting for carrier'

'No carrier'

plz can someone help me with this.

This is the config:

Building configuration...

Current configuration : 1018 bytes

!

version 12.3

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname Router

!

enable password <removed>

!

username user1 password 0 <removed>

ip subnet-zero

!

interface FastEthernet0/0

ip address 192.168.20.52 255.255.254.0

duplex auto

speed auto

!

interface FastEthernet0/1

no ip address

shutdown

duplex auto

speed auto

!

interface Group-Async1

ip unnumbered FastEthernet0/0

encapsulation ppp

ip tcp header-compression

async mode dedicated

peer default ip address pool setup_pool

no keepalive

ppp authentication chap

group-range 33 48

!

ip local pool setup_pool 192.168.20.200 192.168.20.240

ip http server

ip classless

!

line con 0

line 33 48

flush-at-activation

login local

modem InOut

modem autoconfigure discovery

transport input all

autoselect during-login

autoselect ppp

flowcontrol hardware

line aux 0

line vty 0 4

password <removed>

login

!

end

makchitale · ‎09-09-2004

Is it a NM-16AM or NM-16AM-V2?

Can you please try the following:

1. Remove the POTS phone line from the modem & connect to an external phone device, can we make/receive calls in it?

2. Reverse telnet into one of the modem that has a known working POTS line:

telnet 192.168.20.52 2033 (assuming we telnet into modem 33)

ATDT, does the remote phone ring?

3. Ensure the chassis grounder correctly.

4. Can you try moving the card to another slot or another chassis & see if that helps.

Thanks, Mak

ali-bou.cisco · ‎09-10-2004

Hello Mak, thanks for yur reply:

It's a NM-16AM

1-we can make recieve calls in the line connected in the modem

2-I tried to ring the phone number with the reverse telnet from the modem, I still have 'no carrier'

3- the chassis is grounded

4-I moved the module card to another slot but i still have the same problem, also I tried another module card.

Thanks Ali

makchitale · ‎09-11-2004

Is this problem seen on all the modems or just a few (on this NM-16AM card).

When you say "also I tried another module card" do you mean you tried another spare card? Did that work or fail? OR tried the same card in another chassis?

I stronly suspect a hardware issue with this card, try another card if possible.

Thanks, Mak

ali-bou.cisco · ‎09-12-2004

Hello MAK

This problem is seen on all the modems, and tried another spare card (another NM-16AM, and another NM-8AM).

Thanks, Ali

makchitale · ‎09-13-2004

Did the spare card work or not work? Can you post the output of "sh diag" & "sh ver"?

Thanks, Mak

ali-bou.cisco · ‎09-14-2004

Hello Mak

the spare card didn't work. I early configured a cisco3640 with three NM-16AM, it worked properly, here is it's show diag output:

Cisco Internetwork Operating System Software

IOS (tm) 3600 Software (C3640-I-M), Version 12.0(15), RELEASE SOFTWARE (fc1)

Compiled Wed 27-Dec-00 18:34 by linda

Image text-base: 0x60008918, data-base: 0x60686000

ROM: System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)

Router uptime is 10 weeks, 3 days, 32 minutes

System restarted by power-on

System image file is "flash:c3640-i-mz.120-15"

cisco 3640 (R4700) processor (revision 0x00) with 24576K/8192K bytes of memory.

Processor board ID 26426097

R4700 processor, Implementation 33, Revision 1.0

Bridging software.

X.25 software, Version 3.0.0.

1 Ethernet/IEEE 802.3 interface(s)

1 Serial network interface(s)

32 terminal line(s)

DRAM configuration is 64 bits wide with parity disabled.

125K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

The show diag and show ver of the c3725 are are in the attachement

Thanks, Ali

makchitale · ‎09-14-2004

NM-AM as well as NM-AM-V2 are supported on the c3725.

Can you please confirm that the same cards were used on the c3640 & they worked OR there are different set of cards that work on the c3640 but do not work on the c3725.

If the same card(s) works on the 3640 but do not work on the 3725 then we need to try the follwoing:

1)Just for sanity sake, move to a latest 12.3 main line image.

2)Before upgrading, try a call after removing "modem autoconfigure discovery" from the lines.

3)What is the modem firmware version? show modem version.

Thanks,Mak

ali-bou.cisco · ‎09-15-2004

Hi Mak

I tried all these steps, installing four (04) different spare cards but it still doesn't work, i have the same problem. I downloaded the 1.2.2 firmware for the modems, after installing it on the c3725, the problem is still occuring. I cant' move to the latest IOS image because i don't have it. After removing 'modem autoconfigure discovery', i have the same problem.

this the output of the 'show modem version' with the downloaded firmawre and without it:

Router#sh modem version

Slot 1:MCOM Analog Integrated Modem Firmware Version 1.2.2

Source: flash:/c3600-2600-analog-fw.1.2.2.bin

Boot firmware: 1.1.5

MIMIC firmware: 1.3.3

Modem firmware: 2.3.11

DSP firmware: 0.0.2

Slot 2:MCOM Analog Integrated Modem Firmware Version 1.2.2

Source: flash:/c3600-2600-analog-fw.1.2.2.bin

Boot firmware: 1.1.5

MIMIC firmware: 1.3.3

Modem firmware: 2.3.11

DSP firmware: 0.0.2

Router#sh mod

Router#sh modem v

Router#sh modem version

Slot 1:MCOM Analog Integrated Modem Firmware Version 1.2.9

Source: IOS

Boot firmware: 1.1.5

MIMIC firmware: 1.3.3

Modem firmware: 2.3.21

DSP firmware: 0.0.2

Slot 2:MCOM Analog Integrated Modem Firmware Version 1.2.9

Source: IOS

Boot firmware: 1.1.5

MIMIC firmware: 1.3.3

Modem firmware: 2.3.21

DSP firmware: 0.0.2

makchitale · ‎09-15-2004

I think you should open up a TAC case to expedite resolution.

Thanks, Mak

mosesals · ‎09-24-2004

hi,

it seems that we have the same problem with our c2610XM w/ NM-8AM module.

what's strange is strange with ours is that it works when used with other analog lines not terminated winthin our buidling.

have you had any luck on this? really appreciate if you can share it with us. we're even confused now on who to blame, the telco or the cisco?

tnx.

ali-bou.cisco · ‎10-04-2004

Hi,

You have to verify the ground, the chassis must be well grounded if not you have to build an electrical ground for the network equipements.

Thanks, Ali.

ali-bou.cisco · ‎10-04-2004

Hi Mak

The problem is resolved, it was that tha chassis was connected to a power source not well grounded, when I moved the c3740 in a well grounded place it worked perfectly.

Thanks, Ali

makchitale · ‎10-04-2004

As mentioned in my previous posting proper chassis grounding is very important. Sure do appreciate your inputs.

Thanks, Mak