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Silver

MD110 VoIP

Does anyone know how to connects a remote LIM with the GS in an Ericsson MD110 BC8 environment using VoIP?. We have tried T-CCS but it doesn´t work, the protocol used between the remote LIMs and the GS is propietary, does anyone know this protocol?

4 REPLIES

Re: MD110 VoIP

Since there has been no response to your post, it appears to be either too complex or too rare an issue for other forum members to assist you. If you don't get a suitable response to your post, you may wish to review our resources at the online Technical Assistance Center (http://www.cisco.com/tac) or speak with a TAC engineer. You can open a TAC case online at http://www.cisco.com/tac/caseopen

If anyone else in the forum has some advice, please reply to this thread.

Thank you for posting.

Re: MD110 VoIP

i don't know much about the ericsson, but we connected our voip solution (call manager) to an MD110 via a QSIG card in the ericsson and a pri card in a router setup for primary-qsig.

don't know if this will help

New Member

Re: MD110 VoIP

The protocolls that is used between LIM:s are as you say propietary. What you have to do is send TS 0 and TS 16 transparent to the other side. You also have to send some of the voice channels transparent to the other side. This is because they are sometimes used to download software and other information between LIM:s. Which channels that are used for this is configured in the MD.

In TS 0 are only some bits used for MD signaling and that are the so "called free bits". I guess that you have to do some experimenting to find out which they use. If you can transfer those bits to the other side then you should do fine.

Minimum 7 voice channels must be configured between LIM:s. Four of them must not be compressed because they are used by the system. Remember this is minimum configuration. You have to check how it is done in each system.

/ Rolf

Silver

Re: MD110 VoIP

We have had trouble integrating ericsson gear in the past and here is waht we found:

Ericsson's voice folks have confirmed that there are 4 timeslots that

carry proprietary info during system boot an config changes. Standard

these are 1,3,5 and 7, but these can be changed in the Ericsson boxes.

Ergo, the timeslots that carry this traffic must be passed on when

configuring T-CSS. In addition, some bits in TS0 (the timeslot used for

framing) are used for system management. We do not transport anything in

TS0 in our T-CCS solution.

If this limits your ability to provide a solution, my best advice is to

revisit the IP cloud in your opportunity and figure out if they are

running IP over ATM. If so you can realise complete transparency with

ATM CES. If not, I think we are sadly out of luck.

We have made it work using TDM cross connect/Drop and insert however this rules out the use of an IP network in between the sites.

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