Telos ZephyrExpress user manual Remote Site

Local send plus

ISDN receive

REMOTE

SITE

Music + phone to remote

STUDIO

Remote anncr to studio

Zephyr or
ZephyrExpress
+	Main
	Program
Other	Output
Sources
for
music,
etc.
+	Telephone
	Mix-Minus
+	Remote
	Mix-Minus
Studio Console
Phone
Hybrid

Diagram showing system set-up for remotes with delay in the transmission path and phones

taken at the studio. Note that this is the same as required for satellite links.

Another issue worth considering is the round trip delay. The apparent on-air response time of the talent to callers’ comments will be the sum of {studio-to-remote delay + remote-to-studio delay + talent’s thinking time}. For this reason the studio-to-remote path will generally use the G.722 mode, sacrificing high-fidelity for speed: after all, who needs a high-fidelity line to relay a phone call? If G.722 proves too ragged to use for music or commercials being sent from the studio to a remote site’s public address system, use a Layer 3mono mode for high-quality audio but send the telephone caller’s audio on ZephyrExpress’ second line as a POTS signal.

Other intermediate tradeoffs are possible and will be dependent on your format. You may also be able to significantly speed up the talent’s thinking time by judicious applications of black coffee.

For information on the tradeoff between audio quality and delay, refer to the next section.

AUDIO OPERATIONS 4-15