To support analog Foreign Exchange Station (FXS) or Foreign Exchange Office (FXO) voice ports on Cisco 175x Series Access Routers, you need the Voice Interface Card (VIC)-2FXS or VIC-2FXO (either FXS or FXO VIC, or both).
The Digital Signal Processor (DSP) card is called a Packet Voice DSP Module (PVDM), which is installed on the motherboard of the Cisco 175x Series.
The Cisco 1750 platform motherboard has a slot for PVDM modules that provide compression of voice calls so there is no need for an extra Network Module (NM)-2V to house the VIC card.
Make sure your Cisco IOS Software image has the IOS Plus feature set. This is denoted as the "-sv3y" on the image name. If this is not present, the voice hardware is recognized by the platform.
For more information on the FXS or FXO VIC and Cisco IOS Software requirements, refer to these documents:
Note: Calls from the Cisco 175x platform are always run in high complexity mode for the C549 technology type DSP. Therefore, one DSP can handle two calls at most, whereas on other platforms the same DSP can handle either four calls (medium complexity) or two calls (high complexity).
Below are the different combinations of PVDMs for Cisco 1750 and Cisco 1751 platforms.
PVDM-4. Supported on both the Cisco 1750 and Cisco 1751. Contains one DSP and processes two calls (1 FXO/FXS VIC card).
PVDM-8. Supported on both the Cisco 1750 and Cisco 1751. Contains two DSPs and processes four calls (2 FXO/FXS VIC cards).
PVDM-12. Supported on both the Cisco 1750 and Cisco 1751. Contains three DSPs and processes 12 calls (3 FXO/FXS VIC cards).
PVDM-16. Supported only on the Cisco 1751. Contains four DSPs and processes 16 calls (4 FXO/FXS VIC cards).
PVDM-20. Supported only on the Cisco 1751 Digital Signal Processor. Contains five DSPs and processes 20 calls (5 FXO/FXS VIC cards).
I recently had a problem with a BE6000S not booting properly, and had to contact Cisco support. During the boot process VMWare 5.5.0 Build 1131820 hangs at "Loading module ipmi_si_drv".The support technician was asking me about CIMC - Cisco Integrated Man...
I have a customer who has CUCM 12, and they have successfully registered it to a Smart Account. They recently had a license violation for 1 user, so I decided to check the License Usage Report on CUCM for details on what devices that user is assigned to. ...
I am trying to dial any number on one of our Cisco 7911 Phones but nothing happens when press dial button because it removed landline number....it was working fine on monday,,,what's the solution? @artreeland (view in My Videos)
Dear membersI'm searching the to large and world wide web for following information.- When and how are codecs negotiated?- what has the priority? Diel-peer or the endpoint? (e.g. codec transparten vs codec list vs fixed codec)- what is the impact of confi...