How can you see the firware running on an Cisco 857? ADSL2+ sync issue

I have an 857 running on an ADSL2+ connection at a customer site.  At first it was running IOS 12.4(15)T and it would not sync at all.  

I down graded the IOS to 12.4(6)T10 and the unit got sync and all seemed fine.  Now after periods of use the router will lose sync and we have to power cycle it to get it to connected again.  The router doest look like it has crashed as the CD light is still flashing.  However when I look in the logs after reboot there is no indication that int a0 went down.

I have been reading other comments on EE and people are suggesting I need to upgrade the firmware to

My question is how can I see what firmware is currently running on this unit.  I have run sh ver and get the following output:

Cisco IOS Software, C850 Software (C850-ADVSECURITYK9-M), Version 12.4(6)T10, RELEASE SOFTWARE (fc4)
Technical Support:
Copyright (c) 1986-2008 by Cisco Systems, Inc.
Compiled Thu 17-Jan-08 23:08 by khuie

ROM: System Bootstrap, Version 12.3(8r)YI1, RELEASE SOFTWARE

xxx-xxxxx-data uptime is 1 hour, 41 minutes
System returned to ROM by power-on
System restarted at 09:11:15 UTC Wed Dec 23 2009
System image file is "flash:c850-advsecurityk9-mz.124-6.T10.bin"
any suggestions welcome!
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memo_tntConnect With a Mentor Commented:
your current FW is

FW Version:       2.5.42

so go this link and choose the FW that compatable with your router Flash/Ram

4.10.9 in table 8 supports you

here is the running IOS

georgemasonAuthor Commented:
Thanks for the response - i can see the IOS is 12.4(6)T10 is this then specifically linked to the firmware? on the Cisco site
table8 it looks like you can have different firmwares running but I am not sure how to see this on the router.
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there are different releases and the one you have is c850-advsecurityk9-mz.124-6.T10.bin

as sh version shows this

System image file is "flash:c850-advsecurityk9-mz.124-6.T10.bin"
georgemasonAuthor Commented:
do you know how i find out which IOS has the firmware associated with it?
There is no IOS version as
plz check the comment again ..
can you post it ..?

georgemasonAuthor Commented:
I have been on the Cisco community forums and one user has upgraded to which he says has fixed the problem - please see link;jsessionid=66658BF3471DBD37EF31FCD625119CCD.node0

 and comment made on the 25th November - quoted below

"I am please to let you know that firmware 4.0.018 appears to sort out the issues.

Unfortunately my line only goes to 4M even with ADSL2+, but it is stable.

Next report will be on a greater than 12M line"

"We have also played with DSL Modem firmware 3.0.33 and more recently 4.0.015 (which incidently works very well on UK ADSL2 Annex A).  None have helped."

as author mentioned: it's a DSL modem and not Cisco product
most cisco IOS images comes with tags similar to 12.4(T6) etc

georgemasonAuthor Commented:
Ahhh so its the dsl firmware I need to find out.  do you know how I do this?

I have tried the command sh dsl int a0 and I get this - but I cant see the firmware anywhere

Alcatel 20190 chipset information
             ATU-R (DS)                  ATU-C (US)
Modem Status:       Showtime (DMTDSL_SHOWTIME)
DSL Mode:       ITU G.992.5 (ADSL2+) Annex A
ITU STD NUM:        0x03                         0x2
Chip Vendor ID:       'STMI'                         'BDCM'
Chip Vendor Specific:  0x0000                   0x9386
Chip Vendor Country:   0x0F                   0xB5
Modem Vendor ID: 'CSCO'                         'BDCM'
Modem Vendor Specific: 0x0000                   0x0000
Modem Vendor Country:  0xB5                   0xB5
Serial Number Near:    FHK09333166
Serial Number Far:    
Modem Version Near:    12.4(6)T10
Modem Version Far:     v09.07.06      
Capacity Used:       100%                         100%
Noise Margin:       11.0 dB                    1.5 dB
Output Power:       19.0 dBm                   12.5 dBm
Attenuation:       36.0 dB                   15.0 dB
Defect Status:       None                            None                        
Last Fail Code:       None
Watchdog Counter: 0x41
Watchdog Resets: 0
Selftest Result: 0x00
Subfunction:       0x00
Interrupts:       7673 (0 spurious)
PHY Access Err:       0
Activations:       1
LED Status:       ON
LED On Time:       100
LED Off Time:       100
Init FW:       embedded
Operation FW:       embedded
FW Version:       2.5.42

              DS Channel1        DS Channel0      US Channel1        US Channel0
Speed (kbps):                0             15300               0               992
Cells:                      0           1783237               0          34338889
Reed-Solomon EC:          0              3444               0                 0
CRC Errors:                0                 1               0                 0
Header Errors:                0                 1               0                 0
Total BER:              0E-0             3502E-12
Leakage Avarage BER:        0E-0             1788E-12
Interleave Delay:         0                 8               0                 2

LOM Monitoring : Disabled

georgemasonAuthor Commented:
Excellent - I cant believe I didn't see that!

Thanks for all your help, much appreciated.

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