Raycomm are a UK based, leading developer of custom software and electronic
design solutions for innovative technological products and systems.
Our expertise extends to development at all layers from the OSI (Open Systems Integration)
model including the Medium Access Control layer, Digital or Radio Link Control layer,
Network layer, Transport and User layers. Particular protocol stacks we have worked with
include ISDN, 3G, DECT, TCP/IP, UDP/IP with Ethernet drivers, RANAP, RADIUS (accounting and
authentication) and
TETRA and include development, modification, integration and
porting activities. Additionally we have expertise of inter-working to PBX/PABX,
interworking different protocol stacks (e.g. ISDN to DECT), application and MMI development.
When developing in this area we often use SDL to define and prove the design, we have
extensive experience of using Telelogic TAU and Object Geode tool sets. The final
implementation is usually in hand coded 'C' however we have also worked with direct code
generation with Telelogic tools.
We have experience of porting to many different platforms with Burst Mode Controllers
from National Semiconductors, Siemens and Phillips with various microprocessor cores.
Where we can assist
Complete layer or stack development and integration into an application or product
Integration and porting of a 3rd party layer or stack into an application or product
Modification or enhancement of an existing layer or stack to add new features
Inter-working between stacks of different types e.g. GSM to DECT, ISDN to DECT
Inter-working to PABX
MMI development
Application development
Addition of supplementary services
Some of our development experience in these areas are documented in the
past project section and range from stack development, porting, integration, formal ETSI
testing and complete application development.
The following breaks down of some of the areas we have worked on within the individual
lower layers:
Network Layer
Call Control, network peer to peer procedures
Supplementary Services
Connection and Connection-less Message Services
Mobility Management
Identity, Authentication, Location, Access Rights and Subscription procedures
External Hand-over procedures
Ciphering Control
Database functions
Digital or Radio Link Control Layer
Control and User Plane Peer to Peer procedures
Data link services, LAPC
I/RR frame command and response
MAC connection management
Connection hand-over
Medium Access Control Layer
MAC management procedures
Cluster Control Functions
Cell Site Control
Frame and Multi-frame structures
Broadcast control
Multi-bearer control
Connection setup
Bearer Hand-over procedures
Physical layer interface
For a no-obligation discussion with one of our senior consultants on your project needs:
