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New Member

VoIP advice

I got a 3661 route with only ONE FREE slot. Can somebody advice me on the type of network module and IOS I should buy If I want to use E&M or FXO for 4 telephone connections.

I want the setup to be like this

telephone<--->PABX <--------->3661<-------->1751V<--->telephone

We have got two branch office and want them to connect to the HQ and be part of the HQ PABX. There will be no PABX at the branch office(Later).

We use 1024Kbps lease line between the brach office's and the HQ

I believe I got enough memory. here is the show version of my 3661 router

sho ver

Cisco Internetwork Operating System Software

IOS (tm) 3600 Software (C3660-I-M), Version 12.2(5a), RELEASE SOFTWARE (fc1)

Copyright (c) 1986-2001 by cisco Systems, Inc.

Compiled Thu 04-Oct-01 22:21 by pwade

Image text-base: 0x600089C0, data-base: 0x60A60000

ROM: System Bootstrap, Version 12.0(6r)T, RELEASE SOFTWARE (fc1)

ITC-Central-1> uptime is 21 hours, 52 minutes

System returned to ROM by reload

System image file is "flash:c3660-i-mz.122-5a.bin"

cisco 3660 (R527x) processor (revision 1.0) with 83968K/14336K bytes of memory.

Processor board ID JAB0549801G

R527x CPU at 225Mhz, Implementation 40, Rev 10.0, 2048KB L2 Cache

Bridging software.

X.25 software, Version 3.0.0.

Basic Rate ISDN software, Version 1.1.

3660 Chassis type: ENTERPRISE

5 FastEthernet/IEEE 802.3 interface(s)

10 Serial network interface(s)

2 ISDN Basic Rate interface(s)

16 terminal line(s)

DRAM configuration is 64 bits wide with parity disabled.

125K bytes of non-volatile configuration memory.

40960K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

Hope someone helps

New Member

Re: VoIP advice

First you need an IP Plus feature set image in order for the IOS to recognize your voice hardware.

As for voice cards, I would suggest to use E&M cards. The parts are NM-2V the network module in which the VIC-2E/M cards (2, providing you 4 ports) reside.

You can use the VIC-2FXOs as well depending on if your PBX can do loop/ground signaling but in order to avoid the supervisory disconnect issues E&M is preferred.

I hope that helps.

New Member

Re: VoIP advice

How about the branch office. Will I use FXS card or FXO ?

New Member

Re: VoIP advice

At the branch office if you are going to use just analog phones directly attached to the router then you would use the FXS cards. You can not connect analog devices(phones/faxes) to the FXO port directly.

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