Specifications

Typical Configurations

For deployments with more than 100 nodes in a cluster where SIP-TLS will be deployed, it is

highly recommended that Professional Services be contacted to get a more specific value on

location and quantity of SIP-TLS devices per node.

Use of SRTP

SRTP allows voice encryption between Mitel and supported third party devices. It requires

additional resource above Mitel encryption and therefore is only supported on the following

platforms and with the limitation described below:

• MXe III expanded (Note: Maximum E2T channels is reduced from 192 to 150 in gateway

configuration)

• MXe III base

•CX II

•AX

• MiVoice Business for ISS

• MiVoice Business Multi-instance

• Virtual MiVoice Business

Mitel proprietary voice encryption is supported in ACD deployments. However, due to the

increased load SRTP places on the solution SRTP voice encryption is not supported in ACD

configurations and must be disabled via ESM.

Paging and Background Music Limitations

Using the speaker on IP phones for either group paging or playing of background music can

require significant resource usage on the controller. In the 3300 ICP controllers (including the

MXe Server) one channel of the E2T function is used for every device either receiving a page

or listening to a music source (whether that source is analogue, digital, or embedded). Although

only a single echo canceller is used in either case, the heavy use of E2T channels could cause

blocking on trunk calls or other features. Similar limitations exist in the media server with

MiVoice Business on industry standard servers (MiVoice Business for ISS, MiVoice Business

Multi-instance, and Virtual MiVoice Business).

The following table shows recommended maximum values for the various platforms, although

these limits can be exceeded on systems with lower than normal traffic (e.g. hospitality), up to

the number of available E2T channels. Be aware that paging to a large number of users takes

time to set up all of the voice connections, especially under heavy system traffic, and the first

words spoken may not be heard by some recipients.

Table 16: Music and Paging Limits

Controller Type Music or Paging Limit

CX/CXi or CX/CXi II 16

AX, MXe base 32