Re: T.38 fax relay

What type of fax relay does the vsat support?

You may want to try a few things:
-Try either T.38 or passthrough, and not both at the same time. See
if you get different results.
-Definitely take the echo cancellation tail off the voice ports - I
can't think of any advantages for you here.
-Try removing the speed and ecm configurations.

Many times people start with these large found-on-the-internet
configurations which may not be the best for your environment, and
just starting at scratch allows you to troubleshoot more clearly.

-nick

On Mon, May 2, 2011 at 4:28 PM, Aelius Maximus <ael.maximus_at_gmail.com> wrote:
> Hi Experts,
>
> I have a NOC with 60 remote sites connecting over satellite. On the hub, I
> have an E1 connected from PSTN to a Cisco AS5350XM voice gateway. VoIP is
> already setup with all remote sites and works well. However when I try to do
> fax, i face some issues. A fax call sent from the remote vsat to PSTN works
> fine. However when the fax is from the PSTN, to the remote vsat, i sometimes
> get half a page. Once in a while i get a full page but mostly I get varying
> amounts of output - from nothing at all to about 3/4 of a page.
>
> The network is setup as follows.
>
>
> PSTN---------AS5350XM------------NOC-------Satellite------vsat
> modem--------fax machine.
>
> The NOC is from Hughes and is basically a star topology with vsats as the
> spokes. The vsat modem has two FXO ports- one connects directly to the fax
> machine and the other to a telephone.
>
> I'm new to voice and fax so please take a look at the voice gateway's config
> and let me know if you find anything. I'm using dial-peer 26 for the fax
> tests.
>
>
> Current configuration : 20649 bytes
> !
> version 12.4
> service timestamps debug datetime msec
> service timestamps log datetime msec
> no service password-encryption
> !
> hostname VGW
> !
> boot-start-marker
> no boot startup-test
> warm-reboot
> boot-end-marker
> !
> enable secret
> !
> !
> !
> resource-pool disable
> no aaa new-model
> clock timezone atlanta 4
> spe default-firmware spe-firmware-1
> !
> !
> no ip cef
> !
> !
> multilink bundle-name authenticated
> isdn switch-type primary-net5
> !
> voice call send-alert
> voice rtp send-recv
> !
> voice service pots
> fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback none
> !
> voice service voip
> signaling forward unconditional
> fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback none
> h323
> h245 tunnel disable
> h245 caps mode restricted
> modem passthrough nse codec g711alaw
> !
> !
> voice class codec 1
> codec preference 1 g729br8 bytes 60
> !
>
> fax interface-type fax-mail
> !
> controller E1 3/0
> framing NO-CRC4
> pri-group timeslots 1-31
> !
> controller E1 3/1
> framing NO-CRC4
> pri-group timeslots 1-31
> buffers large permanent 1
> buffers large max-free 5
> buffers large min-free 1
> buffers huge permanent 1
> buffers huge max-free 5
> buffers huge min-free 1
> !
> !
> !
> interface GigabitEthernet0/0
> ip address 192.168.14.80 255.255.255.0
> duplex full
> speed 100
> no negotiation auto
> h323-gateway voip interface
> h323-gateway voip id gk.test.com ipaddr 192.168.14.70 1719 priority 126
> h323-gateway voip h323-id VGW
> h323-gateway voip tech-prefix 1#
> h323-gateway voip bind srcaddr 192.168.14.80
> !
> interface GigabitEthernet0/1
> ip address 192.168.10.254 255.255.255.0
> duplex full
> speed 100
> no negotiation auto
> !
> interface Serial0/0
> no ip address
> shutdown
> clock rate 2000000
> !
> interface Serial0/1
> no ip address
> shutdown
> clock rate 2000000
> !
> interface Serial3/0:15
> no ip address
> encapsulation hdlc
> isdn switch-type primary-net5
> isdn timer T310 400000
> isdn incoming-voice modem
> isdn sending-complete
> no fair-queue
> no cdp enable
> !
> interface Serial3/1:15
> no ip address
> encapsulation hdlc
> isdn switch-type primary-net5
> isdn timer T310 400000
> isdn incoming-voice modem
> isdn sending-complete
> no fair-queue
> no cdp enable
> !
> interface Group-Async0
> no ip address
> encapsulation slip
> group-range 1/00 1/59
> !
> !
> ip route 0.0.0.0 0.0.0.0 192.168.14.100
> no ip http server
> !
>
> control-plane
> !
> voice-port 3/0:D
> echo-cancel coverage 32
> bearer-cap Speech
> !
> voice-port 3/1:D
> echo-cancel coverage 32
> bearer-cap Speech
> !
> dial-peer voice 2 pots
> destination-pattern .T
> direct-inward-dial
> port 3/0:D
> forward-digits all
> !
> dial-peer voice 1 voip
> tone ringback alert-no-PI
> shutdown
> destination-pattern .
> progress_ind setup enable 3
> session target ras
> codec g729br8 bytes 60
> fax-relay ecm disable
> fax rate 9600
> fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback none
> !
> dial-peer voice 3 pots
> shutdown
> forward-digits 0
> !
>
> dial-peer voice 26 voip
> tone ringback alert-no-PI
> destination-pattern 24635601
> progress_ind setup enable 3
> modem passthrough nse codec g711alaw
> session target ipv4:xxxx.xxx.xxx.xxx
> codec g729br8 bytes 60
> fax-relay ecm disable
> fax rate 9600
> fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback none
>
>
> gateway
> timer receive-rtp 1200
> !
> ss7 mtp2-variant Bellcore 0
> ss7 mtp2-variant Bellcore 1
> ss7 mtp2-variant Bellcore 2
> ss7 mtp2-variant Bellcore 3
> !
> line con 0
> line aux 0
> line vty 0 4
> password
> login
> line 1/00 1/59
> modem InOut
> !
> scheduler allocate 10000 400
> end
>
>
>
> Thanks
>
>
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Received on Mon May 02 2011 - 20:53:47 ART