Ok...I am far from an expert at Call manager so this may seem like a silly question but I have been asked by a client to "Update their calling search spaces to incorporate 077XX mobile numbers".... now, from that... I am assuming that they want to be able to call numbers beginning with 077.. I have never updated a calling search space before but I am sure that this particular issue is resolved by inserting a translation pattern for their site which enables them to be able to dial that number? So has the client used the wrong terminology? Or am I wrong... and in what instance would I edit a CSS?
If your client is attempting to dial 077XX numbers, then a 'route pattern' would be required.
The calling search space will not be altered unless you created a route pattern in a partition that needed to be added to a CSS.
If you create the route pattern in an existing partition that already belongs to the approriate CSS(s), then you will not have to alter/change any css; just create the route pattern, assign to the proper partition, assign proper RL/gateway and test.
A translation pattern could be used if the client wants to dial a certain number and it needs to be translated to another number before being sent out of call manager.
Please see the following link for more info on route patterns and translation patterns: