How to E1 Trunk between cisco 2851 and cisco 2811

[mguccione]

Hi everybody.. I newby in cisco VOIP world.

I would appreciate if someone could help me with the configuration of a cisco router trunk e1 between 2851 and cisco router 2911.

Cisco 2911 has VWIC2-MFT-G703 card and Cisco 2851 has VWIC2-2MFT-T1E1.

Regards & Thanks in advance.

[Chris Deren]

This has been asked few times here before. High level steps:

1. configure network-clock-participate and include these cards on both sides

2. Define card type as E1

3. configure default isdn switch type

4. configure controller for PRI

5. configure one side as network side

6. connect cards with cross over E1 cable

7. configure dial peers pointing to each other

HTH,

Chris

[mguccione]

Thanks  a lot  for the guide.. Could you send me a configuration example of all these steps ... ?.

I would appreciate a lot..

Many Thanks..

[Chris Deren]

Here you go:

Steps 1 - 4  from config t:

network-clock-participate wic 0

network-clock-select 1 T1 0/0/0

card type t1 0 0

isdn switch-type primary-ni

controller T1 0/0/0

clock source internal

pri-group timeslots 1-24

description QSIG PRI

step 5

interface Serial0/0/0:23

no ip address

no ip redirects

encapsulation hdlc

isdn switch-type primary-qsig

isdn timer T310 120000

isdn protocol-emulate network

isdn incoming-voice voice

isdn supp-service name calling profile Network-Extension operation-value-tag local

no isdn outgoing display-ie

no cdp enable

step 7

dial-peer voice 1001 pots

port 0/0/0:23

destination-pattern 4... (assuming 4000 - 4999 point to other side)

progress_ind setup enable 3

progress_ind progress enable 8

forward-digits 4

Chris

[Ayodeji Okanlawon]

In addition to chris excellent guide (+5 chris) Dont forget to configure your clock source appriopriately. Configure your routers such that your clocking is derived from the network side.

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"'Nature is too thin a screen, the glory of the omnipresent God bursts through it everywhere"-Ralph Waldo Emerson

[mguccione]

Hi Guys.

Thanks a lot for responses

They were of big help for me..

I will start a Cisco voice course on October, but before at work are asking to me , to do many things of Cisco IP Telephony.

This time, are asking to configure another voice trunk E1 with config below:

There are the same router with following hardare:

2911 VWIC2-MFT-G703 card and Cisco 2851 has VWIC2-2MFT-T1E1.

"E1 G 703 protocol: select Euro ISDN ETSI, NO CRC, B channels from 1 to  31;  network side at the end router where CCUM Express will be running".

I would appreciate if someone could help me with the configuration & some example.

Thanks a lot.

[Ayodeji Okanlawon · Accepted solution]

Two things:

1. A lot of the configuration has already been provided above.

2. If you search on this forum on online using google you will see how to configure E1 interfaces..

E1 G703 is not a protocol, its an E1 interface type and this is not configurable. Its a hardware specification

Euro ISDN ETSI is not a valid swicth type for ISDN PRI, the closes where euro ISDN is used is in BRI interfaces

NO CRC is configured under the E1 controller..Please look online and see how to configure this...it is a simple command.

Eg controller e1 0/0/0

framing no crc4

B channels are configured using pri-group time slots command, which again is in the config above.

Configuring the router as the network side is also in the config above..

Links on how to configure E1

http://www.icciev.com/1/post/2011/7/configure-cisco-2821-router-as-an-e1-trunk-gateway.html

http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a00800f99bb.shtml

http://www.cisco.com/en/US/products/hw/routers/ps274/products_configuration_example09186a0080094691.shtml

Please rate all useful posts

"'Nature is too thin a screen, the glory of the omnipresent God bursts through it everywhere"-Ralph Waldo Emerson