Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Using VWIC2-2MFT-T1/E1 for data only

I just tried to validate a config for a 2801 that will have three T1s bonded together and had used the VWIC2-2MFT-T1/E1 card to get a decent port density. The config was rejected because I did not have any DSPs in the router. Is this really a problem? If the MFT cards will only be used for data and not voice will it work without them?

13 REPLIES

Re: Using VWIC2-2MFT-T1/E1 for data only

HI

What is the config you are doing?

Regards

JD

Bronze

Re: Using VWIC2-2MFT-T1/E1 for data only

I don't see why the MFT cards would use DSPs. It sounds like the tool is just assuming you're using them for voice.

How many DSPs does your 2801 have? Default would be 2 (one PVDM2-32).

New Member

Re: Using VWIC2-2MFT-T1/E1 for data only

Did you find a solution? I'm having the same issue. I have a WIC-T1-1DSU in slot 3. When I install the VWIC2-2MFT, the system complains.

New Member

Re: Using VWIC2-2MFT-T1/E1 for data only

If I recall correctly this was because the config tool was trying to put the MFT card into slot 0, which is voice only. Once I moved the card to a different slot it validated perfectly.

New Member

Re: Using VWIC2-2MFT-T1/E1 for data only

ablomfield, are you encounter error when you try to bundle all 3 T1 lines? or others ?

please post config. if possible

New Member

Re: Using VWIC2-2MFT-T1/E1 for data only

I'm trying to configure the VWIC2-MFT2 card. when I issue a "card type t1" the only slot option is slot 0 even is I move the card to a different slot. Boot up shows that the card is is in the correct slot.

Any ideas?

New Member

Re: Using VWIC2-2MFT-T1/E1 for data only

Remember that the first 0 refers to a slot directly in the chassis (as opposed to a slot on a Network Module)... so a card in slot 2 would be 0/2 so you would type in 'card type t1 0 2'. The first port on that card would be 0/2/0 and the second port would be 0/2/1.

New Member

Re: Using VWIC2-2MFT-T1/E1 for data only

Does your configuration have controller statements? I believe you have to configure the controller with the following

config t

controller t1 0/1/1

channel-group 1 timeslots 1-24

New Member

Re: Using VWIC2-2MFT-T1/E1 for data only

Here is a better example

controller T1 0/0

framing esf

clock source internal

linecode b8zs

channel-group 0 timeslots 1-24 speed 64

Then your serial interface will appear.

New Member

Re: Using VWIC2-2MFT-T1/E1 for data only

did you find a solution?

Cisco Employee

Re: Using VWIC2-2MFT-T1/E1 for data only

This issue is due to the internal architecture of the 2801 router. Slot 0 of the 2801 does not have access to the internal HDLC controllers, so you cannot configure it as a channel group or PRI group

This is <> documented here -

http://www.cisco.com/en/US/docs/routers/access/2800/hardware/installation/guide/01_hw.html#wp1095473

Refer to the table under diagram 7 where it states 'Slot 0 (VIC or VWIC, for voice only)'

There is an internal documentation Bug linked for this symptom (see the release notes below). At this stage it doesn't look like the documentation on CCO has been updated.

Symptoms:

=========

A user trying to configure a voice PRI or a data channel group on a T1/E1 Voice and WAN Interface Card (VWIC) observes the following error message:

%Insufficient resources to create pri-group - it has been removed

or

%Insufficient Resources to create channel group

Conditions:

===========

This behaviour will be observed when a T1/E1 VWIC has been installed in Slot0 of a Cisco 2801 voice router, in any IOS release which supports the hardware.

The Cisco 2801 supports Voice Interface Cards (VICs) and T1/E1 VWICs in Slot0, but as there is no HDLC controller available for this slot, it cannot support data services or a D-channel for a PRI trunk. As such only T1/E1 Channel Associated Signaling (CAS) voice is supported on the VWIC, and not PRI voice.

This defect report requests that all relevant Cisco 2801 documentation on CCO

include information regarding this caveat for Slot0.

Workaround:

===========

Move the T1/E1 VWIC to Slot1, Slot2, or Slot3 and configure PRI voice or data interface there.

Hall of Fame Super Gold

Re: Using VWIC2-2MFT-T1/E1 for data only

Nicely enough, "THIS SLOT ACCEPTS ONLY VICs" is physically marked on slot 0 of 2801 routers.

New Member

Re: Using VWIC2-2MFT-T1/E1 for data only

The problem I have is that the only option I have in the configuration of "card type t1" is that the only option I have is "card type t1 0 0". I moved the card to slot 3, and when I enter card type t1 0 3" I get the ^ (invalid option).

I'm going to try it on another 2801 router to see if I get the same results.

534
Views
5
Helpful
13
Replies