Bosch offers multi-channel encoder

Up to four "hot swappable" encoder and decoder modules, including
previously-released VIP X1600 encoder modules, can be mixed and matched
within the dual redundant power supply VIP X1600 XF base unit. This
feature allows users to add or exchange modules at any time without
interrupting transmission to existing channels. Encoding and decoding
capabilities encased in one device can also help reduce hardware costs
and save valuable space in some end user applications.

The devices feature a 1 Gbps Ethernet port on the rear and two Ethernet
ports and a 1 Gbps small form factor pluggable optical transceiver slot
on the front of the base units ”“ allowing for system designs that
incorporate direct connection to an iSCSI storage array or fiber
connection to a remote storage area network, among others, and making
inside-rack cabling easier.

VIP X1600 XFMD decoder modules feature four analog video outputs plus
bi-directional audio and are capable of decoding up to 10 MPEG-4 video
streams each at a maximum resolution of 4CIF at 25/30 images per second
or up to four MPEG-2 video streams without audio. The decoder can also
be set up to display four full screen video signals or two full screen
and two quad views.

Changing the setup and camera selection in small installations is easy
with the decoder’s web-based user interface or via a video management
system.