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Option Name	Type	Default Value	Regular Expression	Description
`async_operations`	`Unsigned Integer`	`1`	`false`	Number of simultaneous Asynchronous Operations
`bind`	`Custom`		`false`	IP Address and optional port to bind to for this transport
`ca_list_file`	`Custom`		`false`	File containing a list of certificates to read (TLS ONLY, not WSS)
`ca_list_path`	`Custom`		`false`	Path to directory containing a list of certificates to read (TLS ONLY, not WSS)
`cert_file`	`Custom`		`false`	Certificate file for endpoint (TLS ONLY, not WSS)
`cipher`	`Custom`		`false`	Preferred cryptography cipher names (TLS ONLY, not WSS)
`domain`	`String`		`false`	Domain the transport comes from
`external_media_address`	`String`		`false`	External IP address to use in RTP handling
`external_signaling_address`	`String`		`false`	External address for SIP signalling
`external_signaling_port`	`Unsigned Integer`	`0`	`false`	External port for SIP signalling
`method`	`Custom`		`false`	Method of SSL transport (TLS ONLY, not WSS)
`local_net`	`Custom`		`false`	Network to consider local (used for NAT purposes).
`password`	`String`		`false`	Password required for transport
`priv_key_file`	`Custom`		`false`	Private key file (TLS ONLY, not WSS)
`protocol`	`Custom`	`udp`	`false`	Protocol to use for SIP traffic
`require_client_cert`	`Custom`		`false`	Require client certificate (TLS ONLY, not WSS)
`type`	`Custom`		`false`	Must be of type 'transport'.
`verify_client`	`Custom`		`false`	Require verification of client certificate (TLS ONLY, not WSS)
`verify_server`	`Custom`		`false`	Require verification of server certificate (TLS ONLY, not WSS)
`tos`	`Custom`	`0`	`false`	Enable TOS for the signalling sent over this transport
`cos`	`Unsigned Integer`	`0`	`false`	Enable COS for the signalling sent over this transport
`websocket_write_timeout`	`Integer`	`100`	`false`	The timeout (in milliseconds) to set on WebSocket connections.
`allow_reload`	`Boolean`	`no`	`false`	Allow this transport to be reloaded.
`symmetric_transport`	`Boolean`	`no`	`false`	Use the same transport for outgoing requests as incoming ones.

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Option Name	Type	Default Value	Regular Expression	Description
`max_forwards`	`Unsigned Integer`	`70`	`false`	Value used in Max-Forwards header for SIP requests.
`keep_alive_interval`	`Unsigned Integer`	`0`	`false`	The interval (in seconds) to send keepalives to active connection-oriented transports.
`contact_expiration_check_interval`	`Unsigned Integer`	`30`	`false`	The interval (in seconds) to check for expired contacts.
`disable_multi_domain`	`Boolean`	`no`	`false`	Disable Multi Domain support
`max_initial_qualify_time`	`Unsigned Integer`	`0`	`false`	The maximum amount of time from startup that qualifies should be attempted on all contacts. If greater than the qualify_frequency for an aor, qualify_frequency will be used instead.
`unidentified_request_period`	`Unsigned Integer`	`5`	`false`	The number of seconds over which to accumulate unidentified requests.
`unidentified_request_count`	`Unsigned Integer`	`5`	`false`	The number of unidentified requests from a single IP to allow.
`unidentified_request_prune_interval`	`Unsigned Integer`	`30`	`false`	The interval at which unidentified requests are older than twice the unidentified_request_period are pruned.
`type`	`None`		`false`	Must be of type 'global'.
`user_agent`	`String`	`Asterisk PBX GIT-13-13.15.0-rc1-15831593-g3203c3491ag43dc9c3d5f`	`false`	Value used in User-Agent header for SIP requests and Server header for SIP responses.
`regcontext`	`String`		`false`	When set, Asterisk will dynamically create and destroy a NoOp priority 1 extension for a given peer who registers or unregisters with us.
`default_outbound_endpoint`	`String`	`default_outbound_endpoint`	`false`	Endpoint to use when sending an outbound request to a URI without a specified endpoint.
`default_voicemail_extension`	`String`		`false`	The voicemail extension to send in the NOTIFY Message-Account header if not specified on endpoint or aor
`debug`	`String`	`no`	`false`	Enable/Disable SIP debug logging. Valid options include yes	no or a host address
`endpoint_identifier_order`	`String`	`ip,username,anonymous`	`false`	The order by which endpoint identifiers are processed and checked. Identifier names are usually derived from and can be found in the endpoint identifier module itself (res_pjsip_endpoint_identifier_*). You can use the CLI command "pjsip show identifiers" to see the identifiers currently available.
`default_from_user`	`String`	`asterisk`	`false`	When Asterisk generates an outgoing SIP request, the From header username will be set to this value if there is no better option (such as CallerID) to be used.
`default_realm`	`String`	`asterisk`	`false`	When Asterisk generates a challenge, the digest realm will be set to this value if there is no better option (such as auth/realm) to be used.
`mwi_tps_queue_high`	`Unsigned Integer`	`500`	`false`	MWI taskprocessor high water alert trigger level.
`mwi_tps_queue_low`	`Integer`	`-1`	`false`	MWI taskprocessor low water clear alert level.
`mwi_disable_initial_unsolicited`	`Boolean`	`no`	`false`	Enable/Disable sending unsolicited MWI to all endpoints on startup.
`ignore_uri_user_options`	`Boolean`	`no`	`false`	Enable/Disable ignoring SIP URI user field options.

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This documentation was imported from Asterisk Version GIT-13-13.15.0-rc1-15831593-g3203c3491ag43dc9c3d5f

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