From: Marvin Greenlee (marvingreenlee@yahoo.com)
Date: Thu Sep 16 2004 - 15:17:25 GMT-3
There are a variety of methods that can be used for
FAX over IP, including Pass-through, Cisco Fax Relay,
T.38.Fax Relay, and T.37 Store and forward.
Cisco - Fax Services over IP Application Guide -
http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide_book09186a008017cf32.html
Marvin Greenlee, CCIE #12237
Network Learning, Inc.
marvin@ccbootcamp.com
--- gladston@br.ibm.com wrote:
> I found this example to enable FAX communication
> over IP. It is the first time I see the command "fax
> protocol...".
>
> What would occurs without this command?
> (the command help says by default it will use
> 'system' protocol. so what?)
>
>
> Voice Gateway Router 1 Configuration File
>
> interface FastEthernet0/0
> ip address 10.21.9.4 255.255.255.0
> !
> voice-port 1/0/0
> !
> voice-port 1/0/1
> !
> dial-peer voice 1 pots
> destination-pattern 5551234
> port 1/0/0
> !
> dial-peer voice 2 voip
> destination-pattern 5555678
> session target ipv4:10.5.6.7
> codec g711ulaw
> fax protocol t38 ls-redundancy 0 hs-redundancy 0
> fallback cisco
> fax rate voice
>
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/int_c/dpeer_c/dp_app_a.htm
>
> ===================================
>
> fax protocol (dial-peer)
> To specify the fax protocol to be used for a
> specific VoIP dial peer, use the fax protocol
> command in dial-peer configuration mode. To return
> to the global default fax protocol, use the system
> keyword or the no form of this command.
>
> Cisco AS5350, Cisco AS5400, Cisco AS5850
>
> fax protocol {none | system | pass-through {g711ulaw
> | g711alaw}}
>
> no fax protocol
>
> All Other Platforms
>
> fax protocol {cisco | none | system | pass-through
> {g711ulaw | g711alaw}}
>
> no fax protocol
>
> Syntax Description
> cisco
> Cisco-proprietary fax protocol.
>
> none
> No fax pass-through is attempted. All special fax
> handling is disabled, except for modem pass-through
> if configured with the modem pass-through command.
>
> system
> Uses the global configuration that was set using
> the fax protocol command in voice-service
> configuration mode.
>
> pass-through
> The fax stream uses one of the following
> high-bandwidth codecs:
>
> g711ulawUses the G.711 u-law codec.
>
> g711alawUses the G.711 a-law codec.
>
>
>
>
> Defaults
> system
>
> Command Modes
>
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/int_c/dpeer_c/dp_app_a.htm
>
>
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