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New Member

E&M interface (VIC2-2E/M)

Hi.

Is it possible to connect between two routers using their E%M interfaces and ping through the routers between two PCs (the ethernet interfaces do have ip addresses)?

Thank you.

4 ACCEPTED SOLUTIONS

Accepted Solutions

Re: E&M interface (VIC2-2E/M)

Hi Danny,

Never tried this but looks like you can do this.

Here's what mentioned in one of the cisco document -

"The Cisco analog E&M interface functions as the signaling unit side and it expects the other side to be a trunk circuit. When you use E&M interface models Type II and Type V, two signaling unit sides can be connected back to back by the appropriate crossing of the signaling leads. When you use E&M Type I interfaces, two signaling unit sides cannot be connected back to back." -

http://www.cisco.com/en/US/tech/tk1077/technologies_tech_note09186a0080093f60.shtml

This link talks about the wiring -

http://www.cisco.com/en/US/products/hw/gatecont/ps2250/products_tech_note09186a008009452e.shtml

Goold luck mate.

-> Sushil

Blue

Re: E&M interface (VIC2-2E/M)

In short, no.

The E&M interfaces allow for analog telephony connectivity and does not support digital layer 3, or layer 2 addressing so pushing digital packets through them can not work.

An E&M interface connects the cisco device to a telephony trunk with analog signaling for communication to a connected analog interface such as that in a PBX or telco.

The links mentioned in the above post will clearly explain what E&M can do and pushing packets is not possible.

Re: E&M interface (VIC2-2E/M)

Danny/Greg,

I overlooked PC to PC communications.

Not possible Danny.

-> Sushil

New Member

Re: E&M interface (VIC2-2E/M)

E&M is a form of analog telephone circuit used for PBX trunks. Not suitable for packet-based data communication. With the proper wiring you could use two E&M circuits back-to-back as a voice link for telephony.

Not suitable for IP, however.

5 REPLIES

Re: E&M interface (VIC2-2E/M)

Hi Danny,

Never tried this but looks like you can do this.

Here's what mentioned in one of the cisco document -

"The Cisco analog E&M interface functions as the signaling unit side and it expects the other side to be a trunk circuit. When you use E&M interface models Type II and Type V, two signaling unit sides can be connected back to back by the appropriate crossing of the signaling leads. When you use E&M Type I interfaces, two signaling unit sides cannot be connected back to back." -

http://www.cisco.com/en/US/tech/tk1077/technologies_tech_note09186a0080093f60.shtml

This link talks about the wiring -

http://www.cisco.com/en/US/products/hw/gatecont/ps2250/products_tech_note09186a008009452e.shtml

Goold luck mate.

-> Sushil

Blue

Re: E&M interface (VIC2-2E/M)

In short, no.

The E&M interfaces allow for analog telephony connectivity and does not support digital layer 3, or layer 2 addressing so pushing digital packets through them can not work.

An E&M interface connects the cisco device to a telephony trunk with analog signaling for communication to a connected analog interface such as that in a PBX or telco.

The links mentioned in the above post will clearly explain what E&M can do and pushing packets is not possible.

Re: E&M interface (VIC2-2E/M)

Danny/Greg,

I overlooked PC to PC communications.

Not possible Danny.

-> Sushil

New Member

Re: E&M interface (VIC2-2E/M)

Thank you.

Danny.

New Member

Re: E&M interface (VIC2-2E/M)

E&M is a form of analog telephone circuit used for PBX trunks. Not suitable for packet-based data communication. With the proper wiring you could use two E&M circuits back-to-back as a voice link for telephony.

Not suitable for IP, however.

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