Configure Fax Passthrough

This article applies to:	Product	Version
	Tmedia	2.10, 3.0, 3.2
	SBC	3.0, 3.1

To enable passthrough:

1. Select Profiles from the navigation menu.

2. Click Create New Profile

3. Enter a name for the Fax Profile.

• Click Fax/Modem Relay to expand the view.

4. Configure the settings:

• Set Detection Mode to Standard.
• Set Relay Mode to Passthrough.
• Check the Switch to FAX relay upon CNG tone option.
• Set Detection type to "Silence Suppression off"
• Verify the the Codec is the same as the remote end.
• Click Create

5. Verify thet the Profile was successfully created message is displayed.

Path

/configurations/@[configuration_name]/profiles/@[profile_name]

Parameters (text)

/configurations/@[configuration_name]/profiles/@[profile_name]
name                            = "@[profile_name]"

/configurations/@[configuration_name]/profiles/@[profile_name]/call_transfer_options
call_transfer_mode               = "Relay"
call_transfer_timeout            = "1 minute"
terminate_transferor_immediately = false

/configurations/@[configuration_name]/profiles/@[profile_name]/ivr_record
vad_enabled           = false
vad_noise_floor_level = "-30"

/configurations/@[configuration_name]/profiles/@[profile_name]/lnp_options
incoming_lnp_mode = "Terminate LNP"
outgoing_lnp_mode = "No LNP insertion"

/configurations/@[configuration_name]/profiles/@[profile_name]/mlpp_options
look_ahead_for_busy = "LFB allowed"
network_identity    = 0
outgoing_mode       = "No MLPP insertion"
precedence_level    = "PL flash override"
service_domain      = 0

/configurations/@[configuration_name]/profiles/@[profile_name]/tdm_line
subject_to_electric_hybrid_echo = true

/configurations/@[configuration_name]/profiles/@[profile_name]/tones_and_call_progress_options
busy_tone_max_duration                     = "30 seconds"
default_digit_duration                     = 100
default_interval_between_digits            = 60
generate_busy_tone                         = false
tone_definition_profile                    = "USA-Canada"

/configurations/@[configuration_name]/profiles/@[profile_name]/tones_and_call_progress_options/early_media_relay_and_ring_tone_generation
connect_full_duplex_during_early_media = false
delay_before_connecting_early_media    = "0 millisecond"
incoming_calls_early_media_mode        = "Forward from outgoing to incoming call"
outgoing_calls_early_media_mode        = "Automatic early media detection"
ring_tone_starting_state               = "Call Alerted"

/configurations/@[configuration_name]/profiles/@[profile_name]/custom_cause_maps

/configurations/@[configuration_name]/profiles/@[profile_name]/tdm

/configurations/@[configuration_name]/profiles/@[profile_name]/tdm/ss7
default_backward_call_indicator              = "0x5404"
default_backward_call_indicator_enforce_mask = "0x0000"
default_forward_call_indicator               = "0x2001"
default_forward_call_indicator_enforce_mask  = "0x0000"
dont_forward_early_acm                       = false
force_backward_call_indicator_in_anm         = false
forward_application_transport_ie             = false
forward_call_cpg_hold_retrieval              = true
forward_call_indicator_international         = false
forward_call_suspend_resume                  = true
hop_counter_ie_handling                      = "Decrement and forward"
isup_release_location                        = "Private network LU"
relay_release_location_from_other_leg        = false
send_charge_number_ie_in_iam                 = false

/configurations/@[configuration_name]/profiles/@[profile_name]/tdm/ss7_or_isdn
always_send_alerting            = false
cnam_collection_timeout         = "1 second"
cnam_using_alternate_methods    = false
colr                            = false
information_transfer_capability = "Relay"
network_specific_facilities_ie  = ""
send_connected_number_ie        = false
send_display_ie                 = false
support_2_calling_number_ie     = false

/configurations/@[configuration_name]/profiles/@[profile_name]/voip

/configurations/@[configuration_name]/profiles/@[profile_name]/voip/fax_modem_relay
detection_mode                        = "Standard"
enable_early_fax_modem_tone_detection = false
enable_fax_modem_relay                = false
expected_cng_tones                    = 1
fax_modem_tones_detection_duration    = "30 seconds"
modem_vs_fax_distinction_timeout      = "0 millisecond"
relay_mode                            = "T.38"
switch_to_fax_relay_upon_cng_tone     = true
switch_to_passthrough_upon_bell_ans   = true

/configurations/@[configuration_name]/profiles/@[profile_name]/voip/fax_modem_relay/fax_modem_passthrough_parameters
codec               = "PCMU"
detection_type      = "NONE"
force_v152_vbd      = false
jitter_buffer_depth = 40
packet_duration     = "20ms"
support_v152_vbd    = false
use_nse             = false

/configurations/@[configuration_name]/profiles/@[profile_name]/voip/fax_modem_relay/t38_parameters
fill_bit_removal             = false
max_bitrate                  = "14400"
redundancy_count             = 0
transmission_level_minus_dbm = 10
use_v34                      = false

/configurations/@[configuration_name]/profiles/@[profile_name]/voip/rtp_and_audio
clear_channel_packet_duration      = "20ms"
codec_g726_aal2_format             = false
drop_call_thresholds_no_rx_packets = "0 second"
enable_mos_calculation             = false
vad_noise_floor_level              = "-45"

/configurations/@[configuration_name]/profiles/@[profile_name]/voip/rtp_and_audio/echo_cancellation
echo_cancellation_enabled        = true
enable_coefficient_update        = true
enable_dc_removal_filter         = true
gain_power_level                 = "0"
non_linear_processor_tune_option = "Normal"

/configurations/@[configuration_name]/profiles/@[profile_name]/voip/rtp_and_audio/jitter_buffer
initial_depth   = 20
max_depth       = 200
min_depth       = 20
smooth_deletion = true

/configurations/@[configuration_name]/profiles/@[profile_name]/voip/rtp_and_audio/packet_network
packet_loss_concealment = true
type_of_service         = 0

/configurations/@[configuration_name]/profiles/@[profile_name]/voip/rtp_and_audio/rtcp
rtcp_enabled          = false
sdes_cname            = ""
transmission_interval = "5 seconds"
use_xrtcp             = false

/configurations/@[configuration_name]/profiles/@[profile_name]/voip/rtp_and_audio/tdm_volume_control
rx_gain_level = 0
tx_gain_level = 0

/configurations/@[configuration_name]/profiles/@[profile_name]/voip/sdp
force_fax_tones_as_telephony_event = false
profile_sdp_description            = "m=audio 0 RTP/AVP 0 8 101\r\na=rtpmap:101 telephone-event/8000"

/configurations/@[configuration_name]/profiles/@[profile_name]/voip/sip
custom_sip_bye_headers             = "P-RTP-Stat: PS=@{Stat:Rtp:Tx:IPPackets}, OS=@{Stat:Rtp:Tx:IPBytes}, PR=@{Stat:Rtp:Rx:IPPackets}, OR=@{Stat:Rtp:Rx:IPBytes}, PL=@{Stat:Rtp:Rx:Error:LostPackets}, JI=@{Stat:Rtcp:Jitter}, LA=@{Stat:Rtcp:RoundTripDelay}, DU=@{CallDuration}"
custom_sip_bye_headers_enabled     = false
detect_180_with_sdp_as_early_media = true
dont_forward_183_progress          = false
dtmf_relay_scheme                  = [ "Relay DTMF according to RFC2833", "Relay DTMF using SIP INFO messages", "Relay DTMF in band" ]
enable_sip_custom_headers          = false
forward_sip_hold_type              = "SS7 Remote Hold/Retrieval"
forward_ss7_cpg_hold_retrieval     = true
forward_ss7_suspend_resume         = true
max_forwards_handling              = "Decrement and forward"
sdp_combining_options              = [ "Use sender's codec order" ]
sdp_generation_options             = [  ]
send_180_with_sdp                  = false
use_isup_oli_format                = false
use_non_ambiguous_from_tag         = false
use_reason_header                  = true
use_strict_routing                 = false
user_to_user_encoding              = "Escaped text"

Parameters (json)

{
  "call_transfer_options" : {
    "call_transfer_mode" : "Relay",
    "call_transfer_timeout" : "1 minute",
    "terminate_transferor_immediately" : false
  },
  "ivr_record" : {
    "vad_enabled" : false,
    "vad_noise_floor_level" : "-30"
  },
  "lnp_options" : {
    "incoming_lnp_mode" : "Terminate LNP",
    "outgoing_lnp_mode" : "No LNP insertion"
  },
  "mlpp_options" : {
    "look_ahead_for_busy" : "LFB allowed",
    "network_identity" : 0,
    "outgoing_mode" : "No MLPP insertion",
    "precedence_level" : "PL flash override",
    "service_domain" : 0
  },
  "name" : "@[profile_name]",
  "tdm_line" : {
    "subject_to_electric_hybrid_echo" : true
  },
  "tones_and_call_progress_options" : {
    "busy_tone_max_duration" : "30 seconds",
    "default_digit_duration" : 100,
    "default_interval_between_digits" : 60,
    "early_media_relay_and_ring_tone_generation" : {
      "connect_full_duplex_during_early_media" : false,
      "delay_before_connecting_early_media" : "0 millisecond",
      "incoming_calls_early_media_mode" : "Forward from outgoing to incoming call",
      "outgoing_calls_early_media_mode" : "Automatic early media detection",
      "ring_tone_starting_state" : "Call Alerted"
    },
    "generate_busy_tone" : false,
    "tone_definition_profile" : "USA-Canada"
  },
  "custom_cause_maps" : {
  },
  "tdm" : {
    "ss7" : {
      "default_backward_call_indicator" : "0x5404",
      "default_backward_call_indicator_enforce_mask" : "0x0000",
      "default_forward_call_indicator" : "0x2001",
      "default_forward_call_indicator_enforce_mask" : "0x0000",
      "dont_forward_early_acm" : false,
      "force_backward_call_indicator_in_anm" : false,
      "forward_application_transport_ie" : false,
      "forward_call_cpg_hold_retrieval" : true,
      "forward_call_indicator_international" : false,
      "forward_call_suspend_resume" : true,
      "hop_counter_ie_handling" : "Decrement and forward",
      "isup_release_location" : "Private network LU",
      "relay_release_location_from_other_leg" : false,
      "send_charge_number_ie_in_iam" : false
    },
    "ss7_or_isdn" : {
      "always_send_alerting" : false,
      "cnam_collection_timeout" : "1 second",
      "cnam_using_alternate_methods" : false,
      "colr" : false,
      "information_transfer_capability" : "Relay",
      "network_specific_facilities_ie" : "",
      "send_connected_number_ie" : false,
      "send_display_ie" : false,
      "support_2_calling_number_ie" : false
    }
  },
  "voip" : {
    "fax_modem_relay" : {
      "detection_mode" : "Standard",
      "enable_early_fax_modem_tone_detection" : false,
      "enable_fax_modem_relay" : false,
      "expected_cng_tones" : 1,
      "fax_modem_passthrough_parameters" : {
        "codec" : "PCMU",
        "detection_type" : "NONE",
        "force_v152_vbd" : false,
        "jitter_buffer_depth" : 40,
        "packet_duration" : "20ms",
        "support_v152_vbd" : false,
        "use_nse" : false
      },
      "fax_modem_tones_detection_duration" : "30 seconds",
      "modem_vs_fax_distinction_timeout" : "0 millisecond",
      "relay_mode" : "T.38",
      "switch_to_fax_relay_upon_cng_tone" : true,
      "switch_to_passthrough_upon_bell_ans" : true,
      "t38_parameters" : {
        "fill_bit_removal" : false,
        "max_bitrate" : "14400",
        "redundancy_count" : 0,
        "transmission_level_minus_dbm" : 10,
        "use_v34" : false
      }
    },
    "rtp_and_audio" : {
      "clear_channel_packet_duration" : "20ms",
      "codec_g726_aal2_format" : false,
      "drop_call_thresholds_no_rx_packets" : "0 second",
      "echo_cancellation" : {
        "echo_cancellation_enabled" : true,
        "enable_coefficient_update" : true,
        "enable_dc_removal_filter" : true,
        "gain_power_level" : "0",
        "non_linear_processor_tune_option" : "Normal"
      },
      "enable_mos_calculation" : false,
      "jitter_buffer" : {
        "initial_depth" : 20,
        "max_depth" : 200,
        "min_depth" : 20,
        "smooth_deletion" : true
      },
      "packet_network" : {
        "packet_loss_concealment" : true,
        "type_of_service" : 0
      },
      "rtcp" : {
        "rtcp_enabled" : false,
        "sdes_cname" : "",
        "transmission_interval" : "5 seconds",
        "use_xrtcp" : false
      },
      "tdm_volume_control" : {
        "rx_gain_level" : 0,
        "tx_gain_level" : 0
      },
      "vad_noise_floor_level" : "-45"
    },
    "sdp" : {
      "force_fax_tones_as_telephony_event" : false,
      "profile_sdp_description" : "m=audio 0 RTP/AVP 0 8 101\r\na=rtpmap:101 telephone-event/8000"
    },
    "sip" : {
      "custom_sip_bye_headers" : "P-RTP-Stat: PS=@{Stat:Rtp:Tx:IPPackets}, OS=@{Stat:Rtp:Tx:IPBytes}, PR=@{Stat:Rtp:Rx:IPPackets}, OR=@{Stat:Rtp:Rx:IPBytes}, PL=@{Stat:Rtp:Rx:Error:LostPackets}, JI=@{Stat:Rtcp:Jitter}, LA=@{Stat:Rtcp:RoundTripDelay}, DU=@{CallDuration}",
      "custom_sip_bye_headers_enabled" : false,
      "detect_180_with_sdp_as_early_media" : true,
      "dont_forward_183_progress" : false,
      "dtmf_relay_scheme" : [
        "Relay DTMF according to RFC2833",
        "Relay DTMF using SIP INFO messages",
        "Relay DTMF in band"
      ],
      "enable_sip_custom_headers" : false,
      "forward_sip_hold_type" : "SS7 Remote Hold/Retrieval",
      "forward_ss7_cpg_hold_retrieval" : true,
      "forward_ss7_suspend_resume" : true,
      "max_forwards_handling" : "Decrement and forward",
      "sdp_combining_options" : [
        "Use sender's codec order"
      ],
      "sdp_generation_options" : [
      ],
      "send_180_with_sdp" : false,
      "use_isup_oli_format" : false,
      "use_non_ambiguous_from_tag" : false,
      "use_reason_header" : true,
      "use_strict_routing" : false,
      "user_to_user_encoding" : "Escaped text"
    }
  }
}