The h323 configuration element is the top level of the H.323 configuration, and it contains h323 parameters that apply globally.

Parameters

state

Enable or disable H.323 functionality.

• Default: enabled
• Values: enabled | disabled

log-level

Select the log level for monitoring H.323 functionality. This parameter overrides the process-log level field value set in the system-config element only for H.323 functionality. If the state parameter in this element is set to disabled, this parameter still overrides the process-log-level field from the system-config element for H.323.

• Default: INFO
• Values: EMERGENCY | CRITICAL | MAJOR | MINOR | WARNING | NOTICE | INFO | TRACE | DEBUG | DETAIL

response-tmo

Set the number of seconds SBC waits between sending a SETUP message and receiving no response before the call is torn down

• Default: 4
• Values: Min: 1 / Max: 2147483647

connect-tmo

Set the number of seconds SBC waits between sending out a SETUP message and failing to receive a CONNECT message before the call is torn down. If the SBC receives a PROCEEDING or ALERT message from the endpoint, it will tear down the session after this timer elapses if a CONNECT message is not received.

• Default: 32
• Values: Min: 1 / Max: 2147483647

options

Enter customer-specific features and/or parameters that affect H.323 behavior globally. This parameter sets a comma-separated list of “feature=value” or “feature” parameters.

h323-stacks

Enter the h323-stacks subelement.

rfc2833-payload

Enter the payload type used by the H.323 stack in preferred rfc2833-mode

• Default: 101
• Values: Valid Range: 96-127

alternate-routing

Choose between pre-4.1 or 4.1 behavior:

• Pre-4.0 behavior—Alternate routing is disabled, and the SBC sends a release complete message back to the caller, proxy
• 4.1 behavior—The SBC performs alternate routing, recur
  • Default: proxy
  • Values: proxy | recur

codec-fallback

Enable or disable slow start to fast start codec negotiation.

• Default: disabled
• Values: enabled | disabled

enum-sag-match

Enable or disable matching against the hostnames in ENUM/LRT lookup responses and session agent groups

• Default: disabled
• Values: enabled | disabled

remove-t38

Enable or disable the removal of t38 fax capabilities received in a SIP call’s SDP, from the TCS of the outgoing IWF call.

• Default: disabled
• Values: enabled | disabled

Path

h323 is an element under the session-router path. The full path from the topmost ACLI prompt is: configure terminal , and then session-router , and then h323.