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New Member

E&M to E&M connection

I have a problem on connection from E&M(HQ) to E&M(branches).

The connection between E&M(branch1) to E&M(HQ) is fail.

But when the call made from E&M(branch1) to

FXS(branch2) and HQ to branch1 can be done.

Can someone help me.

4 REPLIES
New Member

Re: E&M to E&M connection

I would need a little more information to help you out . What exactly are we dealing with ?

jkoniecki@yahoo.com

New Member

Re: E&M to E&M connection

I'm using 3640 for HQ and 1750 for branches.

So then

|---

|

PABX---(E&M)3640--

|

New Member

Re: E&M to E&M connection

Hy Folks,

E&M Interfaces are used to connect PBX in case you cannot use an BRI-Interface. First of all please check if the E&M Type Version is configured well. Then you have to check the signaling Type as well. It can be either wink-,immidiate-, or ground-start depending on the PBX you are using. All these parameters must be the same on all E&M-interfaces (Router and PBX side) otherwise it won't work. Some PBX use different cable pinouts as the Cisco E&M Interfaces do. Please look at the links I send to you. Finaly if you have a serial connecten between HQ and branch1 please check if the dial-peers on both sides are configured well.

Links: http://www.cisco.com/warp/public/788/signalling/e_m_cab_pin.html

http://www.cisco.com/warp/public/788/signalling/21.html

Michael

New Member

Re: E&M to E&M connection

Check the ff:

1. Wiring

2. Grounding, analog interfaces sometimes will not

work if not grounded. pin 8 of the E&M interface is

used for grounding.

3. Signalling ( wink or immediate)

4. Operation ( 2 wire or 4 wire)

Make sure all parameters are the same with the PBX.

Based on my experiences you need to start with the

wiring, almost all problems start from there.

http://www.cisco.com/warp/public/788/voip/voip_debugcalls.html

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