You can point
a single gateway at more than one Mediation Server but you can point only one Mediation
Server at one gateway.
As a general rule, if you are deploying a hybrid gateway, the Mediation Server is collocated
and should not be pointed at any other Mediation Server.
Hardware sizing for the Mediation Server will depend on the number of E1 or T1 cards
that are in the media gateways you will support. A single-processor, dual-core 2 GHz machine
with 2 GB of RAM and two 1 GB network interface cards (NICs) will support four T1 or
three E1 interfaces. A single-processor, dual-core 3 GHz machine with 2 GB of RAM and
two 1 GB NICs will support fi ve T1 or four E1 interfaces. A dual-processor, dual-core 3 GHz
machine with 2 GB of RAM and two 1 GB NICs will support 10 T1 or eight E1 interfaces.
A dual-processor, quad-core 2.66 GHz machine with 2 GB of RAM and two 1 GB NICs
will support 18 T1 or 14 E1 interfaces.
NOTE
E1 is a European equivalent of the North American T1. It differs slightly from
T1, as it does not take bits, so all eight bits are used to code the signal on each
channel. This enables the E1 (2.048 million bits per second) to carry more
data than the T1 (1.544 million bits per second). You can interconnect the two
for international use.
The Mediation Server we will confi gure in this chapter will use two NICs. One NIC will
interface to the gateway and the other will interface to the OCS and will provide the internal
next hop for the Mediation Server.
Pages:
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230