07-14-2009 07:55 AM - edited 03-15-2019 06:58 PM
Is it possible to put 4 NM in the 3845? I am trying to put a fax solution together using the EVM-HDA- ??? 24FXS. can I put 4 of them in a 3845 for a total of 96 fxs ports?
Is there a maximum amount of FXS ports you can add to a 3845 router?
07-14-2009 08:54 AM
A 3845 only supports two EVM modules per chassis. You'll also need to carefully plan your DSP resources to ensure you have enough.
Supporting documentation:
http://www.cisco.com/web/partners/downloads/765/tools/quickreference/isr.pdf
EVM-HD Slots: Extension Voice Module - High-Density
-The EVM-HD has the same form factor as a regular NM1
-EVM-HD offers additional voice services and higher density for in a module format.
-EVM-HD slot can take advantage of the PVDMs on the motherboard to
provide service to voice interfaces.
-The dedicated EVM slots on the 2821 and 2851 cannot accept NM/NME modules.
On the 3825, 1 EVM module is allowed in either of the 2 NME slots. On the 3845, 2 EVM modules are allowed in either of the 4 NME slots.
07-14-2009 08:57 AM
What is the largest EVM port density can two support 96 fax machines? Is there some type of device which allow 100 fax ports?
07-14-2009 09:44 AM
The EVM supports up to 24 FXS ports so you could get up to 48 ports in a 3845 chassis.
For that density within a single chassis you would probably need to look at the AS5400 series chassis with an external demuxer to down-step from the T1 to individual FXS ports. I wouldn't recommend this approach though. I would just use multiple chassis.
05-05-2010 05:50 AM
Is there a way to bulk add these ports into CUCM for this type of gateway (3845)?
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