Communications Support Forums
Hi there!
Having looked through some Capacity plus codeplugs I have noticed that system engineers here tend to program portables as conventional devices while mobiles are programmed with trunked channels.For example, a system has three sites. Mobiles have only 1 trunked channel and the site is voted automatically. Portables have 3 different channel, each representing one of the sites' traffic channel. If a mobile operator wants to make a call he/she selects their trunked channel and wait for the roaming to select the best site. If a portable operator wants to call anyone, he/she first should find out shich channel suits best (by RF or geographical means) and tries to make a call. If the radio issues a deny bonk then other channel should be tried.
One of the system engineers said it was their "policy" not to program portables in trunked mode. I didn't believe him and programmed my portable radio with "real" trunked channels just like mobile radio. It appeared that trunked portable performs poorly - it states "out of range" and scans for a site while conventional portable can place calls if the right channel is selected.
Why is it so?
The second question - if a portable makes a call on one of the traffic channels of a trunked site, can it interoperate with a trunked radio? I doubt a trunked radio can interoperate with a conventional one (vice versa) since one never knows which channel is selected by the radio when it is trunked.
Has anyone encountered any similar capacity plus systems?
Alex
Having looked through some Capacity plus codeplugs I have noticed that system engineers here tend to program portables as conventional devices while mobiles are programmed with trunked channels.For example, a system has three sites. Mobiles have only 1 trunked channel and the site is voted automatically. Portables have 3 different channel, each representing one of the sites' traffic channel. If a mobile operator wants to make a call he/she selects their trunked channel and wait for the roaming to select the best site. If a portable operator wants to call anyone, he/she first should find out shich channel suits best (by RF or geographical means) and tries to make a call. If the radio issues a deny bonk then other channel should be tried.
One of the system engineers said it was their "policy" not to program portables in trunked mode. I didn't believe him and programmed my portable radio with "real" trunked channels just like mobile radio. It appeared that trunked portable performs poorly - it states "out of range" and scans for a site while conventional portable can place calls if the right channel is selected.
Why is it so?
The second question - if a portable makes a call on one of the traffic channels of a trunked site, can it interoperate with a trunked radio? I doubt a trunked radio can interoperate with a conventional one (vice versa) since one never knows which channel is selected by the radio when it is trunked.
Has anyone encountered any similar capacity plus systems?
Alex