Cisco IOS Telephony Service (ITS) Configuration and Troubleshooting

Cisco IOS Telephony Service (ITS), once known as IP Keyswitch, is an IP Telephony call handling arrangement incorporated into Cisco IOS® Software that fits in the Cisco Architecture for Voice, Video, and Integrated Data (AVVID). The fundamental idea is to give negligible PBX/key-change usefulness to few IP telephones straightforwardly appended to the voice entryway. Cisco ITS can be sent in examples where a branch office either doesn't have a WAN or has WAN network through satellite connections. 

Cisco ITS bodes well in circumstances where a client might want to add a communication administration at such a site without fundamentally requiring the entirety of the communication highlights found in Cisco CallManager. This report portrays an example organization of the ITS component in an example organization. 

Note: Cisco ITS isn't the equivalent, cisco telephony nor are the highlights the equivalent, as the Survivable Remote Site Telephony (SRST) include that is utilized related to Cisco CallManager. 

Prerequisites 

Prior to endeavoring this design, if it's not too much trouble guarantee that you meet the accompanying requirements: 

Experience with Cisco IOS Telephony Service Version 2.01. 

An essential comprehension of TCP/IP basics, for example, IP tending to, DHCP, Network Time Protocol (NTP), TFTP, and HTTP 

An essential comprehension of Cisco IOS Software basics, for example, order line interface (CLI) design 

An essential comprehension of Voice over IP (VoIP) basics, for example, arranging dial-peers, voice ports, and nature of administration (QoS) 

Segments Used

The data in this archive depends on the accompanying programming and equipment renditions: 

Cisco IOS Software Release 12.2(8)T or later, with at least IP Plus (IP/VOX Plus on the 1700 arrangement) include set. This report accepts Cisco ITS 2.0 help in Cisco IOS Software. 

Cisco 3660 Gateway with IOS Software Release 12.2(11)T with the IP PLUS list of capabilities is utilized in the design model, albeit most IAD 2400, 1700, 2600, 3600, and 3700 arrangement switches are right now material. Kindly check the Cisco IOS Software discharge notes for current variant and programming support data. 

The Cisco ITS 2.0.3 programming group was utilized in this model. You can download this group from Software Download: Cisco CallManager Express/ITS and SRST (enrolled clients just) . 

To help Cisco ITS, it is suggested that you have the greatest measure of memory for every stage, particularly if the most extreme number of telephones and the Distinguished Names (DNs) for the stage are to be arranged. 

In this model, a Catalyst 3500 Series XL switch is utilized as the branch office switch. Arrange separate VLANs for voice and information for quality and security reasons. 

The data in this record was made from the gadgets in a particular lab climate. The entirety of the gadgets utilized in this archive began with a cleared (default) arrangement. On the off chance that your organization is live, ensure that you comprehend the possible effect of any order.