VoIP Lab Addendum for B143 Lab
| This document outlines changes you will need to make if you are working on VoIP labs in the B143 lab instead of the normal B144 lab. |
| It is not possible to do labs using the T1 connections in the B143 lab because the room does not have a PSTN simulator and the routers in B143 do not support voice T1 use. All other VoIP labs can be completed in B143 though. |
General Pod Differences in B143
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The B143 lab uses Cisco 1941 routers instead of Cisco 2811 routers.
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These routers are newer, but less powerful. Most notably instead of FastEthernet interfaces the 1941 routers have GigabitEthernet interfaces so Fa0/0 becomes Gi0/0 and Fa0/1 becomes Gi0/1. The 1941 routers in B143 also do not have voice T1 capabilitities so T1 labs can not be completed in B143.
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Not all switches in B143 support Power over Ethernet (PoE) which provides power to your VoIP phones. Only pods 3, 6, and 7 have PoE switches.
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You will see these pods have 4 switches instead of 3. The 4th switch is a PoE switch, be sure to use the PoE switch for your phones.
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You will need to power on your pod equipment by using the power switch located above the top router on each pod.
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Remember to erase your configurations and power off your pod equipment when you are done with the lab.
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IP Addressing & Phone Extensions
In the B143 lab you will need to adjust the IP address of the Router 0/0 interface. Instead of 172.17.144.xx/24 you will use 172.17.143.xx/24
The chart below shows the changed addresses you should use
| Pod | Asterisk ens192 IP | Pod Router Gi0/0 IP | Phone Extension Range | Classroom Switch Asterisk Port |
|---|---|---|---|---|
Pod A |
172.17.219.11/24 |
172.17.143.11/24 |
2100-2199 |
Gi1/0/31 |
Pod B |
172.17.219.12/24 |
172.17.143.12/24 |
2200-2299 |
Gi1/0/32 |
Pod C |
172.17.219.13/24 |
172.17.143.13/24 |
2300-2399 |
Gi1/0/33 |
Pod D |
172.17.219.14/24 |
172.17.143.14/24 |
2400-2499 |
Gi1/0/34 |
Pod E |
172.17.219.15/24 |
172.17.143.15/24 |
2500-2599 |
Gi1/0/35 |
Pod F |
172.17.219.16/24 |
172.17.143.16/24 |
2600-2699 |
Gi1/0/36 |
Pod G |
172.17.219.17/24 |
172.17.143.17/24 |
2700-2799 |
Gi1/0/37 |
Pod H |
172.17.219.18/24 |
172.17.143.18/24 |
2800-2899 |
Gi1/0/38 |
Pod I |
172.17.219.19/24 |
172.17.143.19/24 |
2900-2999 |
Gi1/0/39 |
Pod J |
172.17.219.20/24 |
172.17.143.20/24 |
3000-3099 |
Gi1/0/40 |
| There are no changes needed to your Asterisk server IP addresses or extension numbers to work in B143 |
Document Build Time: 2025-10-14 23:52:29 UTC
Page Version: 2022.08
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