[cisco-voip] Problem with 2921 and t.38

[Amit Kumar]

Here are some points , we should be looking at.

Does fax transmission fails for same fax numbers, all the time or its
random. ?
In which stage fax fails, during switchover or it's not doing switchover at
all ?
Are we using NSE based, switch over or protocol ?
Faxes are connected with FXS port of same router ?
MGCP & Skinny or H.323 ?


Thanks,
Amit


On Tue, Sep 10, 2013 at 1:27 AM, Reto Gassmann <voip at mrga.ch> wrote:

> Hello Group
>
>
> we have to renew our gateways and have now new 2921 router with pri
> interfaces.
>
>
> now we have Problems sending and receving faxes with t.38. Most of the
> faxes can be sent and received without any problem. However some are not
> transmitted at all. Has anyone a similar situation and can give me some
> hints on how to configure the gateways and waht IOS we could load in order
> to get all the faxes to be sent and received.
>
>
> thank you for any hints
>
> Regrds Reto
>
>
> GW#sh ver
>
> Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version
> 15.3(2)T, RELEASE SOFTWARE (fc3)
>
> Technical Support: http://www.cisco.com/techsupport
>
> Copyright (c) 1986-2013 by Cisco Systems, Inc.
>
> Compiled Thu 28-Mar-13 11:05 by prod_rel_team
>
>
>
> ROM: System Bootstrap, Version 15.0(1r)M16, RELEASE SOFTWARE (fc1)
>
>
>
> GW uptime is 14 weeks, 4 days, 2 hours, 23 minutes
>
> System returned to ROM by power-on
>
> System restarted at 11:53:45 MEZ Thu May 30 2013
>
> System image file is "flash:c2900-universalk9-mz.SPA.153-2.T.bin"
>
> Last reload type: Normal Reload
>
> Last reload reason: power-on
>
>
> Cisco CISCO2921/K9 (revision 1.0) with 479232K/45056K bytes of memory.
>
> Processor board ID xxx
>
> 3 Gigabit Ethernet interfaces
>
> 124 Serial interfaces
>
> 1 terminal line
>
> 4 Channelized E1/PRI ports
>
> DRAM configuration is 64 bits wide with parity enabled.
>
> 255K bytes of non-volatile configuration memory.
>
> 250880K bytes of ATA System CompactFlash 0 (Read/Write)
>
>
>
>
>
> License Info:
>
>
>
> License UDI:
>
>
>
> -------------------------------------------------
>
> Device#   PID                   SN
>
> -------------------------------------------------
>
> *0        CISCO         xxx
>
>
>
> Technology Package License Information for Module:'c2900'
>
>
>
> -----------------------------------------------------------------
>
> Technology    Technology-package           Technology-package
>
>               Current       Type           Next reboot
>
> ------------------------------------------------------------------
>
> ipbase        ipbasek9      Permanent      ipbasek9
>
> security      None          None           None
>
> uc            uck9          Permanent      uck9
>
> data          None          None           None
>
>
>
> Configuration register is 0x2102
>
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>
>
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