Voice Ports

1. FXS Foreign Exchange Station (FXS) Ports Areas of Configuration

   Annotations:

   • Analog phone Fax Modems

   Attachments:

   • Flash Cards
   1. Signaling
      1. Ground Start

         Annotations:

         • 1. Signals new conn. by grounding two wires in the cable temporarily.
         • 2. Must be configured.
         • 3. Typically used for PBX connections.
      2. Loop Start

         Annotations:

         • 1. Signals by going off hook and hence completing the circuit resulting in dropping DC voltage on th eline.
         • 2. Configured by default.
         • 3. Typically used for connecting to analog devices, fax & modems.

         Attachments:

         • Flash Cards
         1. Default
         2. Fax, Modem & analog phones
         3. Off hook , ckt complete
   2. Call Progress Tone
      1. # voice-port 0/0/0............... .# cptone <.......>........IN
   3. Caller ID Info
      1. # voice-port 0/0/0.. # station-id name 3rd Floor Fax. # station-id number 5551000
2. Foreign Exchange Office (FXO) Port
   1. Dial-Type <dtmf/pulse>
   2. ring-number

      Annotations:

      • No. of rings after which router answers. (default 1 ring)

Annotations:

• The T1 interface does not show in the "show ip interface brief" command output since the router does not know whether you will be configuring this (VWIC) interface as DATA or VOICE (T1).

1. CAS >>>> ds0-group command
   1. # conf t #controller t1 1/0 #framing <esf /sf # linecode <ami/b8zs> # clock source <free-running/internal/line # ds0-group 1 timeslots 1-24 type <fxo-loop-start>

      Annotations:

      • Type could be of following types e&amp;m-delay-dial e&amp;m-fgd  (Type II) e&amp;m -immediate start e&amp;m-lmr (landline, mobile. radio) e&amp;m-wink-start ext-sig (external signaling) fxo-ground-start fxo-loop-start fxs-ground-start fxs-loop-start none
      • Ds0-group can be 0-23
      • Timeslots can be 1-24
      1. Clock source Internal used for connecting to PBX (Tie Line)

         Annotations:

         • Clock source line used for connecting to Service Provider
   2. DS0-Group command allows to set signaling type
      1. Ability to connect different N/W types

         Annotations:

         • It means some channels let's say 1-6 by creating ds0 group 5 with channels 1-5 can be connected to PBX [E&amp;M over T1 CAS (dso command means CAS)], while ds0 group 6 with channels 7-24 to PSTN (FXO loop start over T1 CAS)
2. CCS >>> pri-group command
   1. # conf t # isdn switch-type primary-5ess # controller t1 1/0 # pri-group timeslots 1-24 <nfas_d / service>

      Annotations:

      • nfas_d - signaling channel (d channel) service = bearer channel
      1. show voice port summary
   2. With T1 channel 23 (TIME SLOT 24) is always the signaling channel, while with E1 channel 16 (TIMESLOT 17)