From: Scott Morris (smorris@xxxxxxxxxxxxxx)
Date: Thu Aug 03 2000 - 03:36:54 GMT-3
Except for the fact that you have a transmit going to a transmit and a
receive going to a receive, it's a good start. As pairs, 1-2 and 4-5 need
to cross. Which usually means 1 goes to 4 (4 goes to 1) and 2 goes to 5 (5
goes to 2). In your drawing below, the + and - are incorrect also. Just a
note....
Now, bear in mind, what you are doing at this point is creating a T-1
crossover, which is what a PRI will use for it's base transport. You'll be
able to bring the T-1 loop up, and play around with it. I'm not sure to
what extent you'll be able to bring the D-channels up though. *shrug*
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Bert Kellerman
Sent: Thursday, August 03, 2000 1:59 AM
To: Brian Edwards
Cc: 'Kenneth Sacca'; Mark Lewis; ccielab@groupstudy.com
Subject: Re: back-to-back BRI
Sounds like a great feature, can't wait to set it up in the lab!
>From a search, The answer to the next question(How do I make a crossover
PRI
cable?) is:
Pin 1---Receive (+) Ring 2--------Pin 4---Transmit (-) Tip1
Pin 2---Receive (+) Tip2---------Pin 1---Receive (+) Ring 2
Pin 4---Transmit (-) Tip1--------Pin 5---Transmit (-) Ring1
Pin 5---Transmit (-) Ring1-------Pin 2---Receive (+) Tip2
Bert
Brian Edwards wrote:
> Ken,
> Thanks for the link. Here is some text out of it...
>
> ===============
> Before you begin to configure this feature, ensure that the selected
access
> server is in the following condition:
> - The T1 or E1 controllers are operational and configured for ISDN PRI.
> - The D-channel interfaces are operational and configured for ISDN PRI.
> - Each D-channel interface is configured with the isdn incoming-voice
modem
> command.
>
> For example, the selected PRI interfaces might have a configuration
similar
> to the following:
>
> interface Serial1/0/0:23
> no ip address
> no ip directed-broadcast
> isdn switch-type primary-ni
> isdn protocol-emulate network
> isdn incoming-voice modem
> no cdp enable
> ===============
>
> I think this is assuming you want to use this feature to connect to a PBX
> (real world). When using this for back-to-back DDR practice for the CCIE
lab
> "isdn incoming-voice modem" isn't needed, correct?
>
> Thanks,
> Brian
>
> P.S. Does anyone have two 2600's with PRI interfaces to try this out on?
>
> P.P.S Ken, would it be possible for Cisco implement this feature on a 2500
> BRI interface in a future IOS release? Don't worry about conflict of
> interest; Juniper is not planning on implementing ISDN any time soon.
>
> -----Original Message-----
> From: Kenneth Sacca [mailto:ksacca@cisco.com]
> Sent: Wednesday, August 02, 2000 2:36 PM
> To: Brian Edwards
> Cc: Mark Lewis; ccielab@groupstudy.com
> Subject: Re: back-to-back BRI
>
> Ok. Try this link. It spells out exactly how to do this. Brian's link
> is only for marketing. This link is how to configure this.
>
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121
> t/121t3/dtpri_ni.htm
>
> Good luck.
>
> Ken
>
> Brian Edwards wrote:
> >
> > Here is what I've found. PRI only, IOS 12.1(3)T
> >
>
http://www.cisco.com/warp/public/cc/pd/iosw/iore/iomjre121/prodlit/1065_pp.h
> > tm#23001
> > Network Side PRI Signaling, Trunking, and Switching
> >
> > Description
> >
> > The Network side PRI Signaling, Trunking, and Switching feature enables
> > Cisco IOS Software to replicate the public switched network interface to
a
> > PBX. Network
> > Side PRI enables the NAS to provide a standard ISDN PRI network-side
> > interface to the PBXs and mimic the behavior of legacy phone switches.
To
> a
> > PBX, the NAS
> > functions as a National ISDN PRI switch type or an ETSI PRI Net5 switch.
> No
> > change in PBX capability or behavior is required.
> >
> > Call switching using dial peers enables Cisco (voice-over-IP) VoIP
> gateways
> > to switch voice and data calls between different interfaces based on the
> > dial peer matching.
> > An incoming call is matched against configured dial peers, and based on
> the
> > configured called number, the outgoing interface is selected. Any call
> that
> > arrives from an
> > ISDN PRI network side on a supported platform is either terminated on
the
> > NAS, switched to an IP network, or switched to the PSTN, depending on
the
> > configuration. A dial peer is an addressable call endpoint identified,
for
> > example, by a phone number or a port number. In VoIP, there are two
kinds
> of
> > dial peers: POTS
> > and VoIP. The Cisco AS5800 access server switches both voice and data
> calls.
> > The Cisco AS5300 access server switches only voice calls.
> >
> > The Trunk Group Resource Manager (TGRM) supports the logical grouping,
> > configuration, and joint management of one or more PRI interfaces. The
> TGRM
> > is used to
> > store configuration information and to accept or select an interface
from
> a
> > trunk group when requested. A trunk group is provisioned as the target
of
> a
> > dial peer, and the
> > TGRM transparently selects the specific PRI interface and channels to
use
> > for incoming or outgoing calls. A trunk group can include any number of
> PRI
> > interfaces, but all
> > the interfaces in a trunk group must use the same type of signaling.
> >
> > The Class of Restrictions (COR) functionality provides the ability to
deny
> > certain call attempts based on the incoming and outgoing class of
> > restrictions provisioned on
> > the dial peers. This functionality provides flexibility in network
design,
> > allows users to block calls (for example, to 900 numbers), and applies
> > different restrictions to call
> > attempts from different originators. COR is used to specify which
incoming
> > dial peer can use which outgoing dial peer to make a call.
> >
> > In Cisco IOS Software Release 12.1(2)XH, the trunking and COR parts of
> this
> > feature are available only on the Cisco AS5800. The remainder of the
> feature
> > is
> > platform independent.
> >
> > Benefits
> >
> > The Network Side PRI Signaling, Switching, and Trunking feature
> allows
> > you to bypass PSTN tariffed services such as trunking and
administration,
> > extending the
> > cost savings of VoIP.
> >
> > It allows your PBXs to be connected directly to a Cisco NAS, so PBX
> > station calls can be routed automatically to the IP network without the
> need
> > for special IP
> > telephones.
> >
> > It provides flexibility in network design.
> >
> > It also enables you to block calls selectively based on the called
> > number or the calling number.
> >
> > Platforms/Considerations
> >
> > Routers
> > C2600, C36xx, C4x00, C7x00,
> > Access Servers (AS)
> > 5300, 5800
> >
> > First appearance in a Cisco IOS Software Release: 12.1(3)T.
> >
> > Marketing Contact
> >
> > Anita Freeman
> >
> > anfreema@cisco.com
> > ---------------------------------------
> > Brian Edwards
> > Juniper Networks, Inc.
> > JTAC / Technical Support Engineer
> > Ph: 408-745-2152
> > ---------------------------------------
> >
> > -----Original Message-----
> > From: Kenneth Sacca [mailto:ksacca@cisco.com]
> > Sent: Wednesday, August 02, 2000 12:25 PM
> > To: Mark Lewis
> > Cc: ccielab@groupstudy.com
> > Subject: Re: back-to-back BRI
> >
> > A colleague provided me these instructions. I haven't tried
> > it yet. I think you need at least a 12.0 IOS version but I
> > don't know which IOS you will need.
> >
> > HTH Ken
> >
> > Are you trying to set up a back-to-back connection using ISDN ? If
> > that's the case, on the peer serial0:23 interace, you need to issue the
> > command ISDN network. This simulates the network (switch) side of the
> > ISDN connection.
> >
> > You can verify that by doing 'show isdn status' and it should say
> > '**network side configuration'. Be careful with clock sources tho.
> > Generally I make the side which is acting as the network use the
> > internal clock. This can be done by doing 'clock source internal' on the
> > t1 controller.
> >
> > Mark Lewis wrote:
> > >
> > > Sorry, not possible! I wish it was!
> > >
> > > >From: "Ola Aiyegbusi" <ola@compath.com>
> > > >Reply-To: "Ola Aiyegbusi" <ola@compath.com>
> > > >To: <ccielab@groupstudy.com>, <cisco-cert@cciecert.com>
> > > >Subject: back-to-back BRI
> > > >Date: Wed, 2 Aug 2000 12:43:06 -0400
> > > >
> > > >Can you connect two BRI or PRI interfaces back to back to simulate
ISDN
> > or
> > > >connect BRI to PRI directly? I don't have an ISDN simulator but have
> BRI
> > > >and PRI interfaces on my routers
> > > >
> > > >Ola Aiyegbusi
> > > >Network Engineer CCDP, CCNP (Voice Access Specialization)
> > > >ComPath Inc.
> > > >10201 Lee Hwy Suite 140 Fairfax VA 22030
> > > >Phone: 703-383-9550 Ext. 122
> > > >Pager: 1-888-857-5620
> > > >Cell: 703-395-8808
> > > >Fax: 703-383-1369
> > > >Email: ola@compath.com
> > > >Web: http://www.compath.com
> > >
> > >
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