For the connection from ixi-UMS Business near your PBX / NTBA you need a BRI – BASIC rate interface (also famously as a S0) connection. This permits a maximum number of 2 concurrent connections.
The connection can be configured two different kinds:
This mode can only be applied with S0 accesses. PMP means that you have a number of so called MSNs (Multiple Subscriber Number) available on the access for addressing end users. The number of MSNs depends on whether you have a Telecom ISDN (up to 10) access or a PBX ISDN access (limit depends on PBX). Each MSN represents the address of one end user on this access.
Instead of MSNs, so-called DDI digits (Direct Dial In) are used to address end users. This means you have a main number for the access and a number of dial in digits which may follow after the main number (usually at least 2). For example with two direct dial in digits, 100 (00-99) end users can be addressed.
In many PBX's, Q-SIG offers most features in combination with ixi-UMS Business and the ixi-UMS Business Enhanced Voice Package.
Call number transfer to the ixi-UMS Business Server
For the operation of a server-based Unified Messaging Systems, the transfer of the recipient number and the sender number are relevant. With inbound calls, the call numbers are canonized by the ixi-UMS Business Server into a number in the international E.123 format according to ITU-T E.164 (international numbering plan).
In special cases, it may make sense to transfer the recipient number in international E.164 format. If so, this funktion must be aktivated in the ixi-UMS Business Server.
The ixi-UMS Business recipient number should be transferred to the ixi-UMS Business Server as extension/MSN. The ixi-UMS Business Server completes this to an E.123-standard number.
With the sender numbers sent to ixi-UMS Business by the PBX, "NumberingPlan" (NP) and "TypeOfNumber" (ToN) information must be consistent with the format of the number itself.
A ixi-UMS message is received at the site in Munich from the sender number +49 89 123456. The transfer from the PBX / NTBA to ixi-UMS Business e.g. can be transferred via one of the following "information pairs" (NP/ToN):
·Redirecting and Redirection Number
When the ixi-UMS Business with the inbound routing option global "voice-mailbox number" (Route-by-Redirection) shall be used, this must be transferred to ixi-UMS Business as:
Redirection Number, ETSI ETS 300 207
·Call transfehr and callback with ixi-UMS Business
When the features transfer and/or callback shall be used, the following features must be supported in addition:
The service HOLD is needed to hold an active call in order to make the call transfer after having made a consultation call.
Retrieve is needed when the consultation call or the call transfer was not successful in order to reactivate the held call.
·In a lot of PBX's, Q-SIG offers the most features in combination with ixi-UMS Business. Because of this, we recommend to use the protocol Q-SIG with the deployment at a PP-connection.