E1 R2 Modified

[Tinnakorn Mukudomlarp]

Hi,

My customer have a plan to move their PSTN line form Siemen PBX to Cisco Router 2911 (VWIC3-2MFT-T1/E1).

They said that they're using E1 R2 but the signaling has 2 directions, for incoming call from PSTN they used E1 R2 MFC signaling,

for outgoing call used E1 R2 DTMF (used only 1 E1 card). They call it E1 R2 Modified.

Is that possible to configure this in Cisco E1 card?

when they said E1 R2 MFC i'm not sure does it means forward and backward signal or not?

Regards,

Tinnakorn

[paolo bevilacqua]

Yes, it is possible to do that with E1 R2 and Cisco.

However if you want 100% success chances, get ISDN PRI from telco.

[Tinnakorn Mukudomlarp]

Hi Paolo,

Thank you for your answer.

May I ask you for more detail. In the configuration I didn't see how to control the direction of call signaling.

As I said I need incoming call signaling=MFC and outgoing=DTMF. I'm not sure the command.

controller e1 0/0/0

ds0-group 0 timeslots 1-15,17-31 type r2-digital dtmf  -------> Outgoing = DTMF, Incoming = ????

controller e1 0/0/0

ds0-group 0 timeslots 1-15,17-31 type r2-digital r2-compelled ani -----> Outgoing = MFC, Incoming = ???

Regards,

Tinnakorn

[paolo bevilacqua · Accepted solution]

You need two ds0-group with differnet options. One will have DTMF, the other will not. One will be used for incoming, the other for outgoing. For more details you best options is to engage an expert, E1 R2 is not an easy configuration.

Thank you for the nice rating and good luck!

[Tinnakorn Mukudomlarp]

Hi Paolo,

Today I talked with operator, they said that in every channels I have to separate the signaling type

incoming = MFC and outgoing = DTMF.

But in Cisco router, the only way to do is separate ds0-group for incoming and outgoing which mean if

I configure channel 1-15 for MFC and 17-31 for DTMF, I have only 15 channels for incoming and 15 channels for outgoing.

Both customer and operator do not accept that.

Any advice?

Regards,

Tinnakorn

[paolo bevilacqua]

DTMF is for outgoing only. Again, you need expertise to have this working. Otherwise get PRI.