Re: "resource-pool enable" + "pots -> voip gateway" = FAIL
AS5400 platforms are normally installed as dial-in data, voice, fax, or modem access servers. In order to terminate speech type calls (voice, fax, or modem) the access server needs appropriate any service, any port (ASAP) Digital Signal Processor (DSP) resources to be installed.
If the modem, fax, or voice calls are not actually required to be terminated on the access server, but for some reason need to be switched back out to alternate ports, it is possible to configure the AS5400 to act in a purely TDM application where voice call switching is controlled via ISDN D-channel signaling. Data or speech calls can be switched based on the DNIS (called number) through to another interface. Effectively, the access server becomes a TDM voice/data switch. This feature is often called TDM switching, although other names such as hairpinning, tromboning, or dial-grooming are also applied to the technique. Generally, the terms are interchangeable and for this document, the term TDM switching is used. There are no dual tone multifrequency (DTMF) or multifrequency (MF) signaling tones passed with ISDN. Call control is done with High-Level Data Link Control (HDLC) encapsulated D-channel messages. Therefore, there is no need for the DSP resources for voice calls when in the TDM mode of operation.
The access server uses an incoming DNIS (called number) to match on an outgoing POTS dial-peer destination pattern and routes the call out an appropriate port. It is possible to use IOS translation rules to manipulate the called and calling numbers for call routing decisions as well.
Applications of TDM switching can include an access server acting as a small ISDN data/voice exchange (using ISDN network side protocol emulation), or call rerouting via alternate carriers (least cost).
This document describes how to configure an AS5400 to perform TDM switching for voice and data calls. Based on matches made on the DNIS for the incoming call (provided in the ISDN Q.931 setup message), the call is switched from one interface to an alternate interface. The technique also works on other platforms that use TDM backplanes such as the AS5350 and the AS5850.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...