Lucent Technologies 7820-0802-003 manual Specifying the SS7 control protocol

Signaling System 7 (SS7)

Configuring an SS7 signaling gateway

Parameter	Specifies
System-Type	This parameter does not apply when Control-Protocol is set to
	asgcp. When Control-Protocol is set to ipdc-0.x, the system
	sends its value as an ASCII string to the media gateway controller
	in the device registration message. The TAOS unit does not
	interpret the value. Interpretation on the signaling gateway is
	gateway dependent.
Transport-Options	The Transport-Options subprofile contains settings for changing
	the operation of SS7 DDL timers. See “Configuring
	transport-layer options” on page 18-6.

Use-System-IP-Address- Enable/disable use of the system address as the source address for

As-Source	packets generated by the TAOS unit. See “System IP address
	considerations” on page 18-7.

Specifying the SS7 control protocol

With the appropriate software license, TAOS supports either ASGCP and IPDC 0.12 control protocol. If only one of the possible control protocols (asgcp or ipdc-0.X) is licensed on the TAOS unit, the Control-Protocol parameter defaults to the licensed protocol and cannot be modified. However, if both protocols are licensed, the parameter defaults to asgcp. Because of this default and because the TAOS unit does not store unmodified profile items in NVRAM, the setting can be modified unintentionally when you upgrade to new software or enable a new license to support a second control protocol. For this reason, Lucent recommends that you verify the setting after upgrading. If the proper protocol is not specified, change the setting and then reset the unit.

Although the control protocol is configurable in real time, you must reset the system to begin using the new protocol. After the TAOS unit is reset, it establishes a new TCP link to the signaling gateway and begins communicating with it using the specified control protocol.

Configuring transport-layer options

Administrators occasionally need to change the duration of various SS7 DDL timers to fine-tune a signaling link. For example, you might want to change timeouts when integrating a TAOS unit with existing signaling gateways. The following parameters, shown with default values, are used to set TAOS time intervals for waiting and responding to the various signaling link processes:

[in SS7-GATEWAY:transport-options] device-id = 0

t1-duration = 1000

t2-duration = 3000

t3-duration = 30000 window-size = 7 ack-threshold = 6 heart-beat = no

18-6 APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide